I have no problem with people liking and choosing alternate things to myself. But institutionalising acceptance of gay union in law is effectively the state directly sanctioning and affirming sin. Also it is a change in the legal definition of marriage to one that does not work and opens up the possibility of all sorts of union which are deeply immoral. Why cannot you marry your cat for instance if that is what you want and you really love your cat. Why cannot you have two wives if you love both of them or two husbands for that matter. By liberalising the definition of marriage we are opening up a can of maggots.