"I ask this because Christ, at least in the New Testament that I have, never mentioned homosexuality, so we thus don't know what Christ might have thought about homosexuality. Why is the church so up in arms about an issue that Christ never seemed to have mentioned?"
I hear this all the time, anyone?? Bueller, Bueller......
Arguments from silence are not valid. Jesus didn't mention bestiality; is bestiality then okay? Jesus didn't mention kidnapping; is kidnapping now okay?
Jesus upheld the Law of Moses ("I came not to abolish the Law, but to fulfill it ... not one jot or tittle shall pass away until all is fulfilled ....").
In addition, the Apostle Paul is a writer of Scripture, and he definitely mentioned homosexuality. If you believe the entire New Testament is the Word of God, then homosexuality definitely got condemned in it (yes, gays have a way of explaining all that away too).
Christ never mentioned streaking. Christ never mentioned urinating in public. Christ never mentioned child abuse or spouse abouse.
Some things shouldn't have to be mentioned.
Shalom.