How is it a belief? If it is, then your attraction to the opposite sex is also a belief.

the attraction to the opposite sex isn't a belief, its natural. there is a reason only males and females can make a kid together. it's the natural order. homosexuality is out of norm. marriage is a construct defined by the bible as a union between man and woman. the only reason we have marriage is because it is defined in the bible. it isn't homophobic to believe that marriage is for man and woman. it's correct. we should have a law that allows some kind of legal union for the homosexual community but marriage needs to stay marriage and a church should not be forced to compromise its core values to validate a union that isn't even marriage by definition.