I think it's the fact that he is in a position of some power within our industry that makes his personal and political viewpoints relevant to the rest of us. What kind of message does it send to your employees when you support a view that is rejected by (what I'm guessing is) a vast majority of the people in your industry?
The fact is, we can pull our support from people who we think are shitty if we want to in order to push progress forward to the kind of society we want to live it, specifically one where all Americans are treated equally under the law.
If it were up to me, I would completely eradicate the idea of marriage as a government institution, it doesn't belong in their hands in the first place. But I'm very much in the minority on that one.