Mormons are not Christian, and they never have been. They are not Christian for two main reasons, namely, they reject the foundation of the Christian faith, The Holy Trinity, and the doctrine on Christ. Mormons worship a different god than Christians do, and they worship a different christ than Christians do. The faith of the Mormons is incompatible of Christianity.
By the way, Lutherans do not worship Martin Luther. Lutherans respect some of the things that Luther taught, but he is a human being like all the rest of us. He is not a prophet, nor is he infallible. He is certainly not our Savior.
It is really sad that non-mormons profess who we are and what we believe when you don't have a clue. I worship the same God and Christ now as I did when I wasn't LDS, we don't “worship” Joseph Smith, nor do we believe as a prophet he was infallible. Prophets have never been infallible, remember Moses not seeing the promised land? Nor is he our Savior. If you are going to stand in judgement of us, as least have your facts correct.