I dispute that causation. Mass murderers are extreme outliers that usually have identifiable mental problems, and I would say the primary cause of their behavior is those mental problems, not whatever particular thing they say triggered them. Also, even if you did show that a certain ideological group was significantly overrepresented among mass murderers, you would have to rule out the other methods of causation (e.g. this guy is a loner because of various problems, and he joined this group of loners because they welcomed him—doesn't mean the group caused him to go commit the murders, and in fact it's conceivable that being in the group reduces the likelihood of the potential murderers actually going and doing it).
Edit-I don’t know the best way to exit this problem. But I’d probably start with telling the disparate groups that their positions are not so abnormal and maybe they would be happier focusing on other things-like hobbies that require time offline. Have your “incel” days and have days you force yourself to do something, anything else than think that.
Healthcare for mental health is still very much underdeveloped, especially when the patient is male. It is just easier to blame the individual.
The analogy breaks down when you start to try and think of what our "vaccine" might be, though perhaps education can be a rough proxy. It's also possible there's nothing we can do, and we've reached a spread that is incurable...
(1) https://daily.jstor.org/an-affordable-radio-brought-nazi-pro...
Dating apps allow women to expand their dating pool to people they would never encounter in everyday life. I have quite a few female friends and I've been around them while they're swiping around and they are absolutely brutal in a way that's not at all malicious.
Then the regular (male) losers in that system can then all commiserate on 4Chan.
I think a smaller dating pool forced women to give men who _seemed_ less ideal matches a chance and resulted in more successful relationships.
I suspect that both men and women don't have any idea what would actually make a good relationship but they have a "type" that they like. With a limited pool, you could work through everyone of your type in a reasonable time frame. With a larger pool, it can take forever.
Depends on how you define "malicious", doesn't it?
"Incels" are one example of this that you're pointing out here, where a group of people who've always existed without name are now able to group together and create a feedback loop amongst themselves that results in literally mass murder.