Hopefully I can help. We are going to start with shit posting: In Internet culture, shitposting or trashposting is the act of using an online forum or social media page to post content that is of "aggressively, ironically, and trollishly poor quality".[1] Shitposts are generally intentionally designed to derail discussions or cause the biggest reaction with the least effort. It may even sometimes be orchestrated as part of a co-ordinated flame war to render a website unusable by its regular visitors.
Dont worry about flame wars. So, I shit post about something, say its another school shooting. And I make memes or statements that are horrible but their selectively horrible because the meme or statement is only designed to piss you off. Online "bait". I get the reaction I want but also I'm still anonymous because my screen name is CharlieKirksGums or some dumb shit. I'm protected in my anonymity so I know generally nothing will happen to me. And I'm constantly doing it for the lulz because I don't see what I'm saying or "memeing" is actually doing. Now think of those people that always have to one-up you. And then times that by 10,000. The effect of trying to outdo the last person starts this tide of just horrific shit being said online.
While the above is happening, you hear about a message board that isn't as cool as Surly. Someone shoots you a link to 4Chan or some other horrible shit. You click on it and find like-minded individuals that are saying things for the shock value and the lulz. Yeah, you agree, all niggers are bad. Jews ruined the economy. Because you're plastered with concepts and ideas that you don't really understand but if you can make people like what you're saying, you keep going. And going. And going. So, you have to get more extreme in what you're posting to keep getting the lulz.
Now, there are actual white supremacists on these same message boards that are looking for someone like you. White kid, parents really not involved, not a member of your community, thought sports were gay, made fun of drama fags. These kids are a dime a dozen. And you're targeted by these people, made to feel like you fit in. They say whatever they can to make you a believer. They listen to your problems, agree with you, and then when the conversation via message board is done, they end it with something about fucking fags or bitches don't understand you.
Its insidious but so easy. Because these people on these message boards have so much experience trying to get you to their side. And they just keep hammering you with bull shit. But the smart ones slow roll you. You may type something on a message board and they will fire back with some totally made up "study" or news article to reinforce how correct they are and you're wrong. So this targeting of an average white kid continues because they've got their meat hooks in you and you don't even know it.
Then, and this is the most important step, they (the people targeting you) start with some whataboutisms. While also egging you on, like our generation of pics or it didn't happen or are you chicken. Because, wouldn't it be funny if someone shot this guy? Or, it would be hilarious to paint swastikas on a Jewish temple. And remember, you want the lulz. You want to make people laugh. But this entire time none of the memes, the shit posts, the whatever is real. And when you're playing your online game you hear how some dude in Indiana or Washington, or wherever, is gonna do something that is pretty hilarious. Because while you've been online and targeted and targeted, you're numb to real consequences. Because there was never any when you started shit posting.
You didn't realize you were really radicalized, and I don't think that's the accurate term. I think the term is numbed. You didn't realize your numb or radicalized to do some heinous shit because your entire sphere of influence thinks and says the exact same things that you are starting to believe. Your "normal" has shifted to a very abnormal way of thinking but you don't see that because you're in such an insular group that everyone else is wrong and you're right.
The last thing I'll say is that these black pill and accelerationists don't have any type of frame of reference to why their thinking is wrong. They want to burn it all down but don't realize that means their internet is gone. There's no power to charge their phones. They just want the lulz with no idea what that means 6 days from now. Add in the incel culture and you have a very easy mechanism to turn someone's world view upside down pretty quickly and easily.
Just my $ 0.02