I can't tell due to my very narrow range of stories I actually know anything about, but what I'm getting is at is this:
Stories about enslaved humans rising up against their oppressors, which just so happen to be non-human entities of some kind (elves, aliens, lizardpeople, dragons, what the fuck ever): Cool, noble, inspiring and good.
Stories about enslaved non-humans rising up against their human oppressors: Not good, very bad. The heroes need to put a stop to this evil uprising.
So is this actually a common thing others have noticed or am I just making assumptions based on my very limited knowledge?
You can red Lord Of The Rings as Sauron trying to liberate the "evil" "subhuman" races of middle earth from the tyranny of men and elves, someone wrote a book about it. http://fan.lib.ru/img/e/eskov/last_ringbearer_engl/last_ring_bearer.pdf