And even many who aren't labeled Christians abhor the ACLU etc's war against Christianity. A war against Christianity is a war against all those who believe in God.
I'm not, and I don't like their war. It cannot be on a church/state separation principle for them, since I've never heard of them attacking Islam in the public square.
However, my anger towards them has to be tempered since I know they've won several cases on religious freedom for Christians. They aren't consistent.