As you may know there have been a variety of background for mass shooters.
A woman shot up google headquarters when youtube demonetized her videos:
https://www.theguardian.com/technology/2018/apr/04/nasim-najafi-aghdam-youtube-shooting-demonetisation-payments-father
A trans person shot up their school:
https://www.reuters.com/article/us-colorado-shooting/transgender-teen-sentenced-to-life-in-prison-for-deadly-colorado-school-shooting-idUSKCN24Q00D
And there's so many mass shootings in gangland in chicago you can't even list them all out.
But the press likes to push only the ones that meet their man-hating narrative - when the shooter is a white man - like recently:
https://archive.ph/hSkPM
Apparently this is his reddit post history:
https://web.archive.org/web/20210813174435/https://old.reddit.com/user/Jake3572
**Of the last 24 posts he made - 12 of them were to one of reddits protected man-bashing hate subs - **IncelsInAction.
The sub description of itself:
This sub is for mocking the antics of anyone who identifies themselves as "incel." This is a term popularised on Reddit and 4chan meaning "involuntarily celibate" i.e. men who can't get laid. Some of them get really really mad about it, and here are their stories...
...
Incels who comment in here can expect to be relentlessly mocked by this community. If you don't like it, don't post here.
Did reddit's protection of it's anti-male subs contribute to this shooting?
It seems a lot more plausible than the banned "men going their own way" sub.
Well, that's just deeply tragic, more than it is worthy of being called not human. I think it's a more general sense of alienation and loneliness than it is about just "getting laid", and that incel is a term that is greater than the sum of its etymological parts, but sex is ubiquitous in modern pop culture and so easy to latch on to (and believe the majority of people take for granted) when most of your interaction with the world takes place through that lens.
But, well, I'm just speculating too, mostly. People grow toxic when they fall into echo chambers, and that toxicity results in them being confined to that echo chamber by the world outside it.