Sigh... your personal experience with one community does not equal the alliance.
Heck, if it's such a place, it might have rules you likely ignored.
My experience playing both sides is that it's the same. There are "unpleasant" people on both sides and there are pleasant people on both sides.
Actually, despite what some try to pass, horde has always felt more juvenile to me. But, that is my personal opinion, just like yours.