> I think my main takeaway for sites like /pol/ is that you can't really pretend to act one way for humor for extended periods of time without it rubbing off on you in one way or another and that there are too many young people out there that stumble upon places like that and adopt those views since they lack the world experience yet to have formed their own.

As someone with an experience similar to this I think the route is more like:

You do the edgy trolling. You try to get better at being edgy by coming up with better and better arguments for the edgy thing. You start having doubts of "wait, this actually sounds like a good reason?". You have no one to actually seriously discuss the issue with because its outside the Overton Window (ostracisation or bans would be given in serious places if you entertained the ideas), instead you find only stupid strawman arguments. Years of not finding anything to beat those arguments gradually shifts your views.

This effect is one of the reasons I think it's extremely important to have as wide an Overton Window as possible and proper serious safe spaces to talk about taboo things.