I think a lot for the guys that follow these morons and buy into this culture did not have positive male role models growing up, thus turn to media for some guidance.
This does not excuse their conduct or self-delusion, but does explain why it happens.
My kitchen YouTube feed randomly showed me a "Rachel Zegler criticism" video and I was curious so I put it while cooking.
It was basically a 40 min rant where some YouTuber was showing her hypocrisy because she said Hollywood needs more representation from latinos even though she was acting on a movie as a puerto rican. The video could have been 2 minutes long but I noticed it was mostly the guy criticising every single word she's said and telling you how to feel about it.
I checked YouTube the next day and now it's full of alt right channels, for context I mostly watch veritasium, audit the Audit, science podcasts, dw documentaries, kurzgesagt and some music videos, I rarely watch political stuff on that account and yet now I see Ben Shapiro, Piers Morgan, Andrew Tate, Steven Crowder and the likes, literally my whole front page was just them and my automatic queue would be increasingly alt right shit.
I clicked on not interested and don't recommend this channel and yet I constantly see the videos showing up in the front page.
I think YouTube is heavily pushing this type of content, even if you try to show the algorithm that you are not interested. They probably see that it makes people get more engaged with the platform so they are okay with radicalizing everyone just for profit.
No, these people were always sexist, that's why it's so easy to hook them on this bullshit.
We are all socialised with misogyny (as well as cis-heteronormativity) literally from infancy (and those of us who are directly impacted sadly internalise them to a depressing degree), and that's when we need to start fighting against it, not only once the misogynists turn violent (verbally as well as physically), it's too late at that point (even if they can be deradicalized the damage they did is already done).
People only offer derision towards people who fall for this (which is absolutely reasonable), but only a few see it as the fucking tragedy it is, no one gives a fucking shit about young men and their issues or gives them support, who are then taken wholesale by THESE bastards and turned into incels and/or nazis, had young men had any support from decent people we might have less people on the side of the bastards