I guess you could reach and say that God hates sinners and homosexuals are committing a sin, but that's pretty silly at least in Christianity everyone is a sinner.
I think this is an important point about Christianity and homosexuality. While the bible states homosexuality is a sin, it says a lot of things are sins. But it doesn't have some scale of REALLY BAD sins vs tiny sins. Sins are sins when it comes to Christianity. And the only way to salvation is through Jesus.
A church that would reject members based on sinful behavior would have no members. Where I think it gets tricky is that being a good Christian means that you try to overcome your sins as best as you can (you will never be sin-free), so embracing a sin (such as homosexuality) isn't considered being a good Christian.
Being gay in itself is not a sin.
See, for example, Humane Vitae:
For more information, look into the seven deadly sins[1], sins that cry to heaven for vengeance and sins against the Holy Spirit[2].
There is also a passage in one of the epistles of the Apostle St. John:
"If a man knows his brother to be guilty, yet not of such a sin as brings death with it, he should pray for him; and, at his request, life will be granted to the brother who is sinning, yet not fatally. There is a sin which kills; it is not over this that I bid him fall to prayer. Sin may be wrong-doing of any kind; not all sin is fatal." (1 John 5:16-17)[3]
[1] http://en.wikipedia.org/wiki/Seven_deadly_sins
[2] http://www.catholic.com/quickquestions/what-are-sins-that-cr...