That is because all of the Christian churches agree that it is not Christian, that is why Mormons have to be baptised as a Christian to join a Christian church.
You are naturally going to find that Christian book stores have books on the topic.
Can't you get it through your head that the real enemy is the secular, anti religion, anti God, Marxist, policies of the Democrat party. Many denominations and religions are represented in the conservative cause and the Republican party. We need unity, not the propagating of your hates.