They're just scared to use the word terrorist in the context of a white man murdering a lot of people because of his ideology, even though that's what it is. You don't hear them analyzing the state of mind of other extremists from other races. It's partially a racial thing. Shooter a white man? "Oh he was sick, it's not his fault" versus someone of another race who commits a terrorist act "Kill them all he was a monster and they're all like that."

Watch the dialogue and when they start trying to make excuses for what he did, ask yourself if a black man or a person of Middle Eastern descent had done this would they be giving him the same excuses. It's part ableism against people who have MI, and part racism. White men aren't allowed to be called terrorists even when that's what they are.

Have to say they're not rare, there's been over 100 school shootings in the U.S. since Sandy Hook in 2012 and that's not counting the general mass shootings in public places, like the one in South Carolina just a few weeks ago.

(Eta apparently that figure is all shootings at a school not just mass shootings, all of the mass shootings are at 75 in the last three years or so a google search says.