I don't think I gave homosexuality much thought as a young Christian. I 'hated' it on paper of course because god 'hated' it too.
Uber-religious people always seem to lump homosexuality with paedophilia and there was always subtle propoganda floating around, but I don't think I was ever a judgmental person which is probably why religion didn't suit me in the end.
Once I started to realise the various sexual practices in homosexuality (and hetero), I felt icky about anal sex and still do. It didn't make much logical sense to me - it was the orifice for outgoing stuff not incoming

, it can be very painful if not done properly, higher rate of infections and long term problems etc. Didn't sound like something I would willingly participate in. But I still didn't see why being gay was such a big deal. Maybe they needed 'spiritual counselling' and ask for god's forgiveness but I could never treat a homosexual as something less than a human being or get hysterical about it.
Also I started to realise that some of my fantasies involved women and my eyes wandered at men and woman equally so although this troubled me (and I thought as long as I never acted on it, God might not get too angry with me lol), it made me realise that I wasn't inherently bad in any way just because of my natural desires so why do people hate gays so much?
Any way once my atheism started to surface and I become more comfortable with my sexuality and sex in general, I found homosexuality didn't bother me one bit. What people do in their private lives is none of my business and as long as both partners are of the right age and consenting, it shouldn't concern anyone, including the law.
No one should be denied something as fundamental as sexual pleasure, love, partnership etc.
So although I still wouldn't want to have anal sex (although I might be persuaded to enjoy a teeny bit of it lol), I don't see anything rational in hating someone who is not hetero and given my bisexual tendencies, I would be a hypocrite if I did.