Oh, been there done that. I know people who think the term has been watered down because you can't say racist things without being labeled a racist these days. Go figure.
Also, it's not uncommon for these young, white, male mass shooters to be incels. It's becoming quite the trend. I mean, it kinda happens when you're violently outraged that women won't give you the sex that you deserve. It's not a big leap.