Mormons believe that they *are* Christian. I believe that they are, too.
_____________________________________________________
BINGO
On what basis would you assert that Mormons aren’t Christian? They certainly do believe in Christ.
I believe the determination as to who is a Christian and who isn’t is best left to Christ. If Mormons say they are Christians then who am I to argue? They will be judged by Christ by His standards, the standards he applies to His followers — that is the practical implication of their claim, whether they realize it or not. It is a tough standard, and it may well be they live to regret claiming Christian provenance.
As a Freemason I have my own squabbles with Mormonism, but that doesn’t entitle me to say they aren’t Christians.
I can say, however, that certain doctrinal beliefs are, or are not, orthodox Christianity or Biblically supported. Most of these are not essential to salvation, yet we allow them to divide us bitterly.
Salvation comes doing the Father's will, and earnestly repenting when we fail in that.
Many of these “missionary” type churches are clearly NOT orthodox, but that doesn't mean they're not doing our Father's will. They are getting people exposed to the message of Christ; and if the Spirit convicts them, they may very well deepen their faith into more orthodox details.