But Jesus didn;t merely speak about a married man leaving his family, did he?  He also addressed other things about marriage -- such as its indissolubility.  Why do you fail to acknowledge this?

And what on earth does a man clinging to his wife and not allowing outside influences to affect the marital bond have to do with whether gay marriage is Christian or not?  You are full of knowledge that you have no idea what to do with.  It might be better for you to learn car engines inside out and stick to that.