DamienZshadow
...to be Christian, you must follow the Bible. In order to follow the Bible, you must believe that Homosexuality is wrong. Plain and Simple. If they do not, they are no Christian unless they feel they are part of a sect of Christianity that allows it, which I have so far heard of none, but it is always possible since you don't need more than one person to follow, it could just be yourself who believes it. But still, that would mean you are not Christian but a branch of Chirstianity.
Now let's just take a moment right now to defend the bible...
By Christian interpretation, there is absolutely NO valid portion of the bible that denounces homosexuality.
I would recommend the link below to see why I make that statement:
http://tomway.home.att.net/bible_homo.htm
The people today in the Christian community that look down on homosexuality may have entwined their feelings against an unorthodox lifestyle with their very perception of life, but that is not to be confused with the entirety of Christian belief. Truthfully, one of my best philosophical and theological friends online is a completely devout Catholic, and she's one of the most supporting people on multisexuality that I know. In the end, it's not the Christians to blame. It's just a combination of the misinformed and the prejudicing defending themselves with what they believe to be divine translation, relentlessly sullying the name of a religion that by standard is very society-friendly and righteous.
EDIT: I suppose, given a belief in Leviticus from the Old Testament but no authoritary reference of Galatians, you could certainly consider the Jews to have every right in the world to be against homosexuality, but even then the majority accepts it under that rule that you "love thy neighbor." Completing the Abrahamic trio, Muslims believe that it's our god-given freedom to sin and make mistakes, and that punishment of homosexuality is something only the Source can judge (At least, in the most ideal fashion this would be true. I've heard all about the hangings of men for "homosexual behaviour" in Iran, but again, those are just bigots claiming a mandate of heaven when they persecute people. Justified members of Islam would by no means endorse them).