From what I've found, Texas is
number two in terms of the most murders and
executes the most criminals; that seems to support the claim.
Now, I suspect you'll reply that Texas only has the most murders when you account for the number of people in Texas. In that case, their murder rate is still higher than the national average but those arguing about how bad Democratic states murder rates will have to drop that argument -- by murder rate, Republican states are far worse than Republican rates. Mississippi, in this case, becomes the murder capitol of the US (using 2020 numbers), followed by Louisiana, Alabama, Missouri, and Arkansas finishing out the top five.
For the person claiming it was the Northeast that was so violent, this turns out not to be true -- the South appears to be the area with by far the most murders (by murder rate) in the US.
It is also worth noting that this is the fifth mass shooting in Texas in the last 5 years -- despite not being any the last two years during COVID. In 2017 there was the shooting at the
First Baptist Church in Sutherland Springs. In 2018, there was the shooting at
Santa Fe High School. In 2019 there was the
El Paso Walmart shooting and the
Midland-Odessa shooting. And this year was Uvalde Elementary.
There easily could have been more, since there was the
Colleyville Synagogue hostage situation, which likely limited murders due to the synagogue doing online services due to COVID. There was a mass shooting at Kent Moore Furniture, in Bryan, TX, earlier this year, but while seven people were shot only one died -- so it doesn't make the list of mass murders. Earlier this year there was a
mass shooting in Dallas, at a family friendly Easter Party (though the shooting did not occur until late night/early morning, after most kids had left), where 15 were injured and one killed -- so another that didn't make the mass murder list. If I dug, I could find more mass shooting events or attempts -- Texas has had more than its share of mass shootings.