Considering that a lot of christians vote democrat (20% protestant to 40% catholic) you can expect that this move cost him a significant percentage of votes. Good.
Not all of them; some practice churchianity, yes, but some are just normies who don't pay attention to the reality around them.
as a corollary to this; they can't make white people a protected class until they eliminate all of the christians.
Someone's gotta stop eating hornet nets.