Earlier quoted context omitted.
If you think back to before gay marriage was accepted as a culturally obvious fact, some of the arguments against it involved hating gays, but others didn't. Without the ability to tell which beliefs actually motivated his donation, it is not possible to discern if he was against gays or not. (I'll refrain from giving any specific examples in order to avoid starting that debate again, but I think most of us can remem…
What is A genuine reason for being against gay marriage that does not include hating the concept of gays, or the concept of marriage? Two adults want to share their life, with the burdens and rights that non gays get. Really, why would you care if not because you find the concept of same sex couples bad and harmful?
Marriage yields children. Making new people grows a civilization. The state would definitely want to incentive any means to grow a civilization. In the modern day, these incentives look like tax deductions. Gay marriage doesn't yield children. Why should the state give the same incentives?
My solution: The State shouldn't create incentives for people to get married. People will get married because they want to.