Why not include Native Americans and transgendered folk? It doesn't have to be about them, but their presence doesn't hurt the film. I don't really see why you're attempting to equate including a gay character to abortion, though. Abortion is an action and an issue and would obviously have to deviate from the plot. Including a gay character wouldn't affect that in the slightest besides, y'know, the individual in question being attracted to individuals of the same sex rather than the opposite sex. Personally, I have to say that if we found a species of sentient, human-level intelligence dogs on Eart tomorrow, I would be more uncomfortable with a relationship between a human and a dog person than a gay relationship. Perhaps that's due to lack of familiarity, but there's probably a larger biological difference between two species than there is between the male and the female of a species -- just sayin'. That the latter discomforts people while the former doesn't just boggles my mind.