Nope, itis really simple. First, ignore como estsa, she has no idea what she is talking about.
No one has to make a hitler cake or anything offensive like that. Political thought is not protected.

Have you read about people refusing to serve cops? Stupid, but legal. If you refuse to serve white cops, that is a problem.

Make the cake, take the money (business 101) and I gurantee Jesus knows the baker hates gays in his heart. No problem.