Mormons believe that Jesus and Lucifer were brothers.
I can't think of how MORE WRONG they could be in every sense of the word.
They sure can't call themselves Christians.
Mormons claim to be Christian with one hand and say they aren’t with the other.
Mormons claim that God once used to be a man. This is utter blaspheme. In other words, God used to be a sinner. Complete and utter blaspheme.
They also believe that they (Temple Mormans) will be God one day as well.
Shall I go on?