I do not disagree. That being said...I could say pretty much the same thing about being hit on by aggressive straight women! And I'm sure many straight women would say the same thing about aggressive heterosexual men, who they might not happen to be interested in.
However, that being said, I must admit that as a straight person I do not enjoy being hit on by aggressive gay men. I think some folks in the gay community sometimes misconstrue tolerance for something else.
I do not doubt that gay people have probably existed since the beginning of time itself. However, unlike aggressive actions between openly straight individuals we do not have a well established history of social norms between gay suitors and straight targets to fall back on. What we do have is a long history of suspicion, intolerance, and abuse followed by a relatively short period of hypersensitivity. That can be a recipe for trouble if you're not careful. I've seen folks I consider to be perfectly reasonable and tolerant people lose their cool and eventually say something harsh, simply to get an aggressive suitor off their back and out of their personal space, only to be attacked for expressing a hatred they don't actually possess. In some ways it can feel like a trap that some folks have learned to navigate rather deftly in order to bully their way into the business of strangers. Over time I have little doubt that this issue will eventually resolve itself, but until then it can be a bit of a minefield, even for those with open minds and the best of intentions.
Misconstruing social cues certainly isn't more common in the gay community than elsewhere, and I think many gay men are actually more cautious in that regard than average, because they're aware of the intolerance that still exists in much of American society.