It really depends on the field. They are more common the “hard” sciences like physics, mathematics, engineering, chemistry, etc. STEM basically.
They also exist in the social sciences like history and athropology but are farrrrr less common
There are a lot of communists and anarchists here, they are certainly ingrained in the culture. Typically when someone new shows up from reddit complaining about reddit censorship of language its because they said something bigoted and will naturally end up butting heads with leftists.
I’m betting a week before you crash out at a communist.
I’ve met a few biological anthropologists who had some racist ass views, especially in regards to indigenous people.