If it is something you are born with how do some live for decades before coming out of the closet? How have some church groups converted gays to heterosexuality? Why are you not open about that?
If you want to accept what some say on faith that isn't being open minded, its being faithful which isn't a crime but it certainly isn't something you base changing a law on.
And the only "threat" people are looking at is the threat of accepting a lifestyle on faith and changing law based on that faith and not facts.