It's mostly third worlders and tourists.
They just make a lot of threads and gang up/samefag on people complaining to appear relevant. They also do a lot of history revisionism to convice people they were always accepted and even welcomed here when they have never been.
The only reason why their threads don't get shitposted to death is because it's literally forbidden to dislike them, and you will get banned for voicing dissent. They are quite literally the jews of /mlp/.