My boyfriend and I have characters who strongly adhere to science, logic and realism and are heavily anti-political correctness, anti-religion, anti-stupidity and in general have a lot of unpopular opinions and "ethics" that would make society flip it's shit at us. We don't give a flying fuck though because we're making stories about what it needs to hear, not what it wants to hear. The cults of retards are going to throw tantrums in their dying throws- so what. The more extreme and bigoted they become about the tiniest of things alienates them from society that much more. By declining to write a book based on the religious attention it might receive is doing the world a disservice.
You're going to have opposition in anything you do when you think about it, so you might as well just go ahead and do it. And if you do it, go all out; gay that shit up. There's an artist I'm following right now with a web comic. As of now, the central characters aren't dating, they're just friends. But so many fans as well as the artist want them to come out together in the end. And she's afraid to do it because she's scared she'll lose a lot of her readers.
Like you, she might as well just go ahead and do it. It'll be a long time before the real end of the comic ever comes, according to what she told me. During that time she'll have scads of readers. If she loses any in the end, it won't matter because...that'll be the end of the comic. If it's a big let down for them, oh well! They can find something else to read that will make up for it. And in the mean time, she'll have her collection of readers and fans that liked the out come and were pleased with it. The same will go for you. Just write what makes you happy. If you find homosexuality beautiful...write it!
Just don't...pull...an Orson Scott Card. Don't write a gay love scene and years later go, "I DIDN'T MEAN TO WRITE THAT, THE DEVIL MADE ME DO EEEETT!!"
X-Men has allusions to the real world when it comes to being gay or any minority. If straight people like that, then they shouldn't make such a big deal about stuff. Besides, no one is making them read the gay stuff