Every time the missionaries tell the prospective convert that their church (and Christianity in general) is apostate and the only true church is mormon.
Then the Catholics are anti-Christian for telling people that the Protestants are heretics, and Protestants are anti-Christian for telling people that Catholics are pagans.
I guess that means most Christians are anti-Christian.
So maybe the Mormons are also Christian because they are also anti-Christian just like all the other Christians.