Who cares if homosexuality even is a sin? are you Jesus?
Where does it say in the bible anothers sin falls on you?
If these people are sinning then they can take that up with their maker.
Also, don't think that because I take this position that I'm not opposed to gay marriage - I am personally/morally.... I don't think homosexuality should be mainstreamed either (my reasons for that are unique to say the least)....