In other words, the big difference is that the perpetrators in those examples are Muslims.
Here's the thing though, even if you weed out the questionable cases, right wing extremists incidents would still out number Islamic extremists incidents by 2 to 1.
Below are just a few of the 150 terror related incidents involving right-wing extremists between 1993 and 2017 that have a clear connection to ideology.
East Kingdom, New Hampshire, January 2016: An FBI sting operation resulted in the arrest of Daniel Musso and his indictment on four counts of receiving and possessing unregistered explosive devices (grenades). Musso allegedly was attempting to find someone to sell him grenades, shoulder-fired rockets, and C-4 explosives, among other items. Musso allegedly bought four grenades from an undercover informant, describing himself as part of a group of people who wanted to “bring forth the original constitution.”
Garden City, Kansas, October 2016: Three members of a small militia group called The Crusaders were arrested in connection with an alleged terrorist plot to use truck bombs to blow up an apartment complex inhabited primarily by Somali immigrants and where a small mosque was located. Arrested were Curtis Allen, Gavin Wright, and Patrick Eugene Stein, charged with conspiring to use a weapon of mass destruction. According to authorities, the militia members thought that Somalis and immigrants presented a threat to American society and that the defendants allegedly hoped that the bombing might inspire other militia groups and “wake people up.”
Sequatchie County, Tennessee/Hancock, New York, April 2015: The FBI arrested Robert Doggart, an ordained minister and anti-Muslim extremist from Tennessee, on charges related to a plot to attack Muslim-owned buildings, including a mosque and school, in Hancock, New York, and to shoot occupants. Hancock is the location of “Islamberg,” a commune associated with a small Islamic sect. Doggart accumulated weapons and explosives and attempted to recruit militia groups to help him with this attack.
Charleston, South Carolina, June 2015: White supremacist Dylann Storm Roof conducted a deadly shooting spree at the AME Emanuel Church in Charleston on June 17, 2015, killing nine people. Roof deliberately targeted the church because its parishioners were African-American; he hoped to incite a “race war” that he thought whites would win.
Lafayette, Louisiana, July 2015: White supremacist John Russell Houser killed himself after conducting a vicious shooting spree at a movie theater in Lafayette, Louisiana, that left two people dead and nine others injured. Houser was obsessed at the perceived moral decay of the United States.
Gaston County, North Carolina, August 2015: Federal agents arrested three North Carolina men—Walter Eugene Litteral, Christopher James Barker, and Christopher Todd Campbell—on federal conspiracy and explosives charges. Authorities said that the men had stockpiled weaponsand ammunition, and attempted to make pipe bombs and grenades, in order to combat the federal government, which they believed was going to declare martial law.
Chesterfield, Virginia, November 2015: FBI agents arrested three white supremacists on a variety of charges related to plans to incite a “race war” by measures such as bombing or otherwise attacking black churches and synagogues, and other violent acts, including committing armed robbery to finance their other plans.
Minneapolis, Minnesota, November 2015: Police arrested Allen “Lance“ Scarsella in November 2015 after Scarsella and others travelled to a Black Lives Matter protest in north Minneapolis, where Scarsella opened fire on protesters there, shooting five people,
Colorado Springs, Colorado, November 2015: Anti-abortion extremist Robert Dear opened fire at a Planned Parenthood clinic in Colorado Springs, killing three people—including one police officer—and injuring nine more.
Overland Park, Kansas, April 2014: Long-time Missouri white supremacist Frazier Glenn Miller launched an attack on Jewish institutions in the greater Kansas City area, opening fire at two institutions in a shooting spree that took the lives of three people, including one child.
Las Vegas, Nevada, June 2014: Husband and wife anti-government extremists Jerad and Amanda Miller assassinated two Las Vegas police officers in June 2014, killing them while they were eating lunch at a restaurant. The couple then crossed the street to a Wal-Mart, where they killed a civilian.
Austin, Texas, November 2014: Larry Steve McQuilliams of Austin, Texas, a suspected adherent of the racist and anti-Semitic religious sect known as Christian Identity, launched a shooting attack in downtown Austin, Texas, firing over 100 rounds of ammunition at targets including the Austin Police Department, a federal court house and the Mexican consulate. According to police reports, McQuilliams had improvised explosive devices, a map of 34 other targets, including churches, and a copy of the Christian Identity-related book Vigilantes of Christendom: The Story of the Phineas Priesthood in his rental van.
Los Angeles, California, November 2013: Paul Anthony Ciancia, an anti-government extremist fixated on the Transportation Security Administration (TSA), allegedly targeted TSA officers during a November 2013 shooting rampage at the Los Angeles airport. According to police, Ciancia approached a TSA checkpoint and began shooting TSA officers, killing one and injuring two others, as well as a civilian.
Oak Creek, Wisconsin, August 2012: Racist skinhead Wade Michael Page opened fire at a Sikh temple in Oak Creek, Wisconsin, killing six people and wounding four others, including a police officer responding to the shootings.
LaPlace, Louisiana, August 2012: A pair of ambushes by a group of sovereign citizens left two St. John the Baptist Sheriff’s deputies dead and two other deputies seriously injured.
Boston, Massachusetts, January 2009: White supremacist Keith Luke embarked upon a spree of murderous violence against ethnic and religious minorities in the Boston area in early 2009. He raped and shot an African immigrant, and shot and killed her sister, who had tried to help her. Shortly thereafter, he shot and killed a homeless African immigrant. Although he planned to go to a synagogue that evening to kill as many Jews as possible, then commit suicide, police intercepted him before he could do so.
Washington, D. C., June 2009: White supremacist James von Brunn attacked the United States Holocaust Memorial Museum in Washington, D.C., entering the facility and opening fire on security guards inside, shooting and killing one of them.
Knoxville, Tennessee, July 2008: Right-wing extremist Jim David Adkisson killed two people and seriously wounded six when he opened fire on the congregation of a Unitarian Church in Knoxville, Tennessee. Expecting to die during the attack, Adkisson left behind a racist and homophobic suicide note which detailed his desire
to kill liberals and Democrats.
Pittsburgh, Pennsylvania, April 2000: During a racially motivated shooting rampage that targeted ethnic and religious minorities, white supremacist Richard Baumhammers of Pittsburgh, Pennsylvania, shot and killed five people, including an Indian man, a Vietnamese immigrant, a Chinese immigrant, an African-American man, and a Jewish woman. Baumhammers also fired shots into two Jewish synagogues.
Chicago, Illinois, July 1999: During the weekend of July 2-4, 1998, white supremacist Benjamin Smith, a member of the World Church of the Creator, embarked upon a three-day, two-state shooting spree, targeting racial and religious minorities. He killed two people and wounded eleven.
Los Angeles, California, August 1999: White supremacist Buford Furrow, a member of Aryan Nations, traveled from Tacoma, Washington, to Los Angeles, California, where he opened fire inside a Jewish day care center, injuring three children and two employees. Later that day, Furrow shot dead a Filipino-American postal worker.
Olmito, Texas, July 1998: Two anti-government extremists, Jack Abbot Grebe, Jr., and Jonnie Wise, associated with the anti-government Republic of Texas group, conspired to use biological weapons to kill federal officials, including President Clinton, and the directors of the Federal Bureau of Investigation and the Internal Revenue service.
https://www.adl.org/sites/default/files/documents/CR_5154_25YRS RightWing Terrorism_V5.pdf
I don't see how it's possible for someone to look at the examples above and the evidence that clearly shows that right wing extremist incidents have out numbered Islamic extremists incidents in the US for decades and they not be concerned about right-wing extremism.
Most of these incidents resulted in no deaths. Some only resulted in injury....and still others took place before 9/11.
The criteria that you keep using to prop up your claim switches every other post. Do you seriously want to compare the threat that right wing extremism poses with the threat radical Islam poses? I'm more than happy to do this with you....because I think it could be very informative for you....but we need to agree on what things should be counted and what shouldn't.
Here's my criteria....and if you disagree with a point, then explain why and how you would change it. Fair enough? Once we agree, we can come up with some fair numbers for which is morr dangerous.
1. It has to be a physical attack (not going to consider cyberattacks) that is motivated by ideology. That ideology has to have some connection to a group of extremists....no matter how loose the connection...who promote violence. Make sense? If some shouts something racial before killing someone of another race....that doesn't make them a right wing extremist. It makes them racist, but there's a ton of racists on the left these days too. In short, there needs to be both motivation driven by ideology...and some connection to that ideology.
2. Let's not count anyone clearly exhibiting signs of mental illness. If the words they speak aren't coherent or they hear voices or believe in some bizzare delusions about the government or some conspiracy....don't include them. If they need to be medicated in order to stand trial...that's a good indicator of illness. Why are we not counting them? Because their motives are uncertain.
3. I'm willing to count injuries. Many times people are seriously wounded and it leaves them with lasting problems. I'm talking about physical injuries though....not mental/emotional unless they resulted from physical injuries.
4. I'm willing to count failed attempts if you want to....or not. I can rake it or leave it. I would like to point out though that they must have resulted in an arrest so we know about the perpetrator.....I'm not going to entertain speculation.
5. They must be attacks on US citizens on US soil or property. Obviously, killed on an airplane or boat counts....as long as they were American. What doesn't count is an American getting killed at a concert overseas....since the primary targets aren't Americans and we're looking at the danger to Americans.
6. I think we should go back at least 20 years to have the full picture of the modern terrorist threat....though if you'd like to extend it further to include a big event like the Oklahoma City bombing, I'm ok with that....just state what time period you want to examine and why.
Does that sound like a fair criteria to you? If we are comparing the modern threat of Muslim extremism and right wing extremism....I think that is a pretty fair criteria.
If you disagree with any point though, or would alter or add any of the criteria....just say what you would change and why.