From personal experience about 80% of the harassment I recieve is from straight white american males, not kids either, many times they’re middle aged. There are some females in the mix, rarely people of colour but there have been a few.
If I were to guess I would imagine it’s because women and people of colour also belong to vulnerable communities and run the risk of attracting the wrong type of attention and becoming targets themselves.
Not every white american male is a troll or violent obviously but since 2015 the ones who are continue to become active threats.
Honestly I see them almost as victims themselves. No troll, stalker, mass shooter, etc started out that way. They became radicalized online by getting wrapped up in online activities they were not emotionally nor intellectually equipped to handle.
He didn’t start out as a mass murderer, he was radicalized online in places like 8chan. He even posted on 8chan that they needed to keep an eye on Christchurch because something big was going to happen.
It’s not just americans and it’s not just white males but so many get caught up in the culture of trolling that there are going to be those who become fundamentally damaged by the continued activity to the point that they take it too far and sometimes that leads to things like mass shootings, or swatting, stalking or other criminal behaviour.