The problem is when those communities constitute more than half of your users, they generally do creep into all of the other subreddits.
See: 4chan. It wasn't always like it is now, but since /pol/ grew to be so big, now pretty much every board has a sizable or majority far-right contingent. It's even worse on Voat.
See: 4chan. It wasn't always like it is now, but since /pol/ grew to be so big, now pretty much every board has a sizable or majority far-right contingent. It's even worse on Voat.