Why are democrats anti God?

They are not. It's a fact that atheists and agnostics usually consider themselves to be left wing, but that's no reason for thinking that they are all anti christian or anti religion. In fact, the Word "anti" makes me sick when used to talk about being or not being religious. There's no problem with not being religious, we are all beings who everyday try to use their reason and rationality to be better morally, so "anti christian people" should not be just used to label someone, otherwise the anti Christ is you.