It’s the same as it’s always been. We gravitate towards what we feel.
The internet has just allowed certain groups who wmight be ashamed to announce their true feelings to say the quiet part out loud anonymously. This gets the next generation to not see a problem with it and go from there.
As an example. Take an impressionable young boy (14-18), he has trouble getting dates, doesn’t have a great home life. Little bit of a loner. Before the internet, hed have to figure out a purpose. Maybe he’d start going to a gym or hitting the books harder to be smarter or something… With the Internet he’s able to find “friends”, he finds a community, that community may lead him down dark paths… Where some in better living situations may say “this is too much” and walk away, he doesn’t have anything to walk to… So he gets more and more indoctrinated into the cause.