A real photographer will photograph anything, anywhere, at any time, even risking grievous bodily harm to do so. If there are entire categories of very common (non-pornographic) things which you have a moral objection to photographing, you might want to consider changing professions and just sticking to Instagram.
That said, the government actually forcing people to do things is in the long run even worse than casual homophobia or racism, because ultimately it is a soft form of implied violence and the imperialist expansion of cultural hegemony and ruling class ideology. Having to find a new wedding photographer will always be a smaller burden to bear than the knowledge that one day a man with a gun and a government badge might force you to act against your own will.
It wouldnt/shouldnt fall only on the Democratic party. There have been plenty of Republicans calling him a traitor and calling for his execution. The blame should fall on the entire corrupt two party criminal system.