There is no religion in the world which teaches "homophobia" because homophobia is the supposed phobic reaction to homosexual acts and homosexuality, if it exists and there's as much reason to suppose its a political idea from within the psychoanalytical culture wars on the approving, as opposed to disapproving, side of developmental psychology.
If I'm to understand you then contemporaneous respect and valuing of homosexual behaviour has led you to doubt the existence of God, got to say that doesnt particularly endear me to homosexuals and their cause. That's exactly the sort of devastating paradigm shift I've predicted or seen emerging from the whole gay rights idea. In reality it corresponds to the choices of a small number of individuals but its impact is far beyond that population.
The passages in the bible, and I dont believe that any religious scriptures are synonymous with religion, if they are then that religion is dead and the scriptures are its head stone, have been seriously misrepresented. Deliberately so most of the time. There is an agenda. Religious are the dehumanised and villified "other", if you want to consider the other thread on that topic. Now perhaps this is a cyclical thing but presently, even making an allowance for the worst representatives, religion is more sinned against than sinning.
The crimes which are often identified with homosexuality in the bible by modern readers are synonymous with rape and torture, its not about same sex attraction, the whole question of whether or not that is normal or abnormal has a history apart from religion, of course it entered into religion because religion was the main narrative or cultural channel before secularism, politics and pluralism permitted the diversity of thinking which exists today. In times past it would have been difficult to think about anything quite apart from religion or with reference to that. Therefore religion is often saddled with blame for cultural norms and values. Despite even the universality of Roman Catholicism and Christendom before the schisms and reformation fragmenting there was still a high degree of national and regional diversity.
The study of taboos on homosexuality is unlike the study of other taboos on sexual behaviour because of the history. Unless a deliberate bias is adopted condemning the taboo and condoning its breech yesterday and today its virtually impossible to examine and it would eschew any possible research if it where adopted.
The other idea of "our way is right and your way is wrong", I've got to say, what is wrong with that? I mean if everyone did not agree to drive on one side of the road there would be traffic chaos and that is only one example of accepting a single correct way of doing things, its one of the things which worries me about the modern non-judgemental mindset is that so often shuns any certainty and conviction but unconsciously has become so fierce about its norms and values as to make any discussion of them difficult.
It's not just the stance toward homosexuality. It's a lot of things. I don't have a problem with religion on its own, but blind, unquestioning adherence to it can be problematic. I'm not vilifying or dehumanizing anyone. Quite the opposite, in fact-- religious adherents have brains, and they should use them to think critically about what they're taught in church, not just accept it blindly. Some do, of course, but I would say that at least in the US, the vast majority of the religious right do not. Lark, I know you've thought critically about your beliefs, and although I still disagree with some of the beliefs you hold, I can respect that you have a right to your own opinion.
As for the Bible thing, again, I think that has to do with critical thinking. You don't believe in all of it, if I understand you correctly. That's exactly how I feel-- some of it is true and relevant, some of it is blatantly wrong. It's just that in the religion I was raised in (Assembly of God) we were taught that you can't pick and choose what parts of God's word you believe, so even now, after having rejected that religion, I have trouble with the idea of only agreeing with some parts. That's really more where my conflict comes from... the issue with homosexuality is only ONE of the things that the Bible teaches that I believe is blatantly wrong. There are many others. I don't know if what you say is correct, that religion isn't historically responsible for the taboo against homosexuality. You are better versed in religious history than I am, so I'll take your word for it. But be that as it may, I don't find history particularly relevant to this argument-- some (many) religions
nowadays specifically teach that homosexuality is wrong, and today is what concerns me.
From my early religious education: God exists and is perfect and all powerful. He doesn't make mistakes-->The Bible is God's Word. It was written by men, but dictated by God.-->God wrote the Bible and he doesn't make mistakes or change his mind, therefore everything in the Bible is and always will be true and relevant.
My critical thinking: Some teachings in the Bible are true and relevant; others are ethically wrong.-->Therefore, the Bible is not infallible nor timeless.-->Therefore God must not be perfect.-->Can an imperfect God really exist?
See what I mean?
EDIt: To add this part:
As for the "I'm right, you're wrong" thing, my line of work is all about teaching respect for cultural difference. I am, again, all-or-nothing on that one. It's easy to respect that people of other cultures like different foods and wear different clothes. It's a bit harder to respect their different way of going about education, personal distance and or hygiene practices, etc. It's really difficult to respect the treatment of women, systems of justice that are drastically different from mine (sanctioned murder, etc), but again, my personal code of ethics and beliefs doesn't allow me the arrogance of saying where the line between "Different" and "wrong" is. Of course I don't CONDONE the treatment of women in Afghanistan, or sanctioned murder, or things like that. I don't respect the practices themselves. But I respect the right of a culture to determine what is or is not appropriate for themselves.
For example, in the US, we have decided as a culture that driving on the right side of the road is appropriate for ourselves, so our traffic laws were based upon that. I understand you do things differently in the UK and Australia.

It feels totally foreign and unnatural to me when I'm in those places, and I have to be really careful not to get hit by cars when crossing the street, but I'm not going to tell you it's wrong.
