To be more accurate, those in the internet said that the internet forum 4chan was a significant factor.

I think history will prove it was not in the real scheme of things.

However it is still full of sociopaths working on their own nefarious deeds!

That isn't all of 4chan though, there are still some communities left there that aren't too far gone. And most of what you've "noticed" coming from 4chan is actually coming from 8chan, which is the distilled form of /pol/ sociopathy.

Additionally: 4chan isn't a subculture, it is/was a subculture incubator.