There's little doubt in my mind that for every person on websites like /pol/ that's taking the piss with subversive "be as offensive/absurd to the status quo as you can" style of humor there's at least one other person that's internalized those kinds of views as a genuine belief system.

I don't browse 4chan anymore though I did used to (a lot) years ago. Take what I say as anecdotal evidence but I used to chat with a group of people I met through a former friend that seemed to start with a similar mindset to the one you have and then went down the pipeline over a few years of unironically espousing the most absurd abhorrent kind of thoughts you'd see on /pol/ and feeling 100% justified in doing so. They had gotten so used to seeing and interacting with such content day in and day out that it became normalized for them and they started to think that such a large forum existing with people saying similar things validated the way they began to think and act.

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.