These behaviors violate the tenets of both scriptural Judaism and scriptural Christianity. If they are legalized with no exceptions, religions will be forced to hire their pastors and staff accordingly, even if it gave them mortal fear for their salvation.
This is wrong. It would be like forcing Kosher delis to prepare pork because pork-lovers would be offended otherwise.
I do not think the government should meddle in religion. There is a difference to me in hiring for a religious position and a janitor in the church, say.
And remember that legally, we are speaking of orientation and self-identity. Not behavior. You could be homosexual, and yet completely celibate, like that guy on the fashion show, Tim Gunn.