The problem is that he refuses to say they are Terrorists when in the past Muslims have done similar things and he called them Terrorists. Trump did a horrible Job "Condemning all of it" what a load a bull.
...no, he took the exact same approach that Obama took when there were instances of Islamic terrorism.
Which is to choose ones words carefully so that they can condemn the actions without potentially appearing to take sides when neither side is favorable.
A close example would be the political bickering that happened after the shootings that took place at the "Draw Muhammed" context in Texas.
There were calls from Republicans at time asking Obama to "call it what it is, and publicly condemn Islamic terrorism"...and they wouldn't accept just "terrorism", he was pressured to use the specific words "Islamic terrorism" or they would claim he was "being too soft on them".
Again, that was a tough spot to be in...if he only singled out "Islamic Terrorism" in that scuffle, it would've been viewed as him siding with the "let's have Muhammed drawing contest to mock Muslims" crowd...which obviously he didn't want to do. So, much like Trump did in this instance, he took the opportunity to condemn violence, some generic platitudes about how "we all need to come together as Americans", and thanked law enforcement that got the situation under control.
One there's one group setting out to intentionally provoke, and another group takes the bait and violence breaks out, singling out one side for condemnation comes across as "teaming up" with the other side.
Obama's strategists understood this, as do Trump's...
I'm the first one to criticize the alt-right and Trump (and often times, call out people who support him in various aspects of his policies ..
@Rion and
@brinny can attest to that as I've been in many debates with those two, right guys?
...it's not like I'm pro-Trump guy who tries to defend his every action)
However, this is a blatant case of a double standard by many on the left. They're taking the exact same stance here that many of the Anti-Obama people took when he'd make statements about violence, and refrained from specifically using the words "Islamic terrorism".