I'm googling him and am yet to see any quotes or anything attributed to him that even remotely suggests gay people shouldn't 'exist'. If you can help me out here, I'd appreciate it. He has strong religious beliefs, and those beliefs are the same for pre-marital sex, infidelity, etc. It doesn't mean he hates gay people and 'thinks they shouldn't exist'.
FWIW I'm non-religious and support gay rights. However I also support people who have strong religious views and don't think they are any more 'homophobic' than they are infidelityphobic or pre marital sexphobic. Religious beliefs should be respected as much as atheist beliefs or gay beliefs are. It doesn't make him a bad person. I think its very narrow-minded and bigoted to say religious people are wrong for their beliefs.