Replying here to the comment which was removed:

You can and should talk about the biological and social origins of homosexuality if it interests you. But, you should avoid doing it in a way that's insulting.

I would also suggest, since it's a sensitive topic affecting people that have been persecuted, making sure the comments are thoughtful and non-reductionist.

For people who'd prefer to be cavalier about the subject though, there's not lack of spaces on the internet to do so.