Actually, you're wrong here. Read up on the New Covenant. It more or less voids a lot of the Old Testament fire and brimstone type stuff. There is a lot of stuff in Leviticus especially that people pretty much disregard nowadays, like never shaving your beard or never mixing meat and dairy.So basically churches and faiths are allowed to reject the words of the bible as they please?
Im sorry. But the Bible is made up of two books, not one. You can't follow some things from one and some things from other. You either follow all of one, all of the other, or all of both. And if you disregard one for another, then you can't start bringing up ideals that are a part of the one you disregarded.
As for the New Testament, the only solid reference to homosexuality is in here, where Paul names some laws from the Torah which are critical of homosexuality. However, what he says to start with is that as long as you're a good Christian and follow the word of Jesus, the laws from the Torah that he later talks about do not apply to you. Since Jesus didn't say anything direct in regards to homosexuality, it's perfectly possible to be a good Christian and a homosexual. That in itself is also telling; if it had been an issue that God thought important, surely his only son would have had something to say about it.
Just a thought from your friendly neighborhood atheist.