Given that the KJV is the LEAST accurate of all the bible translations, you are on shaky ground already.
(btw, it's LatTer Day Saints. Two "T's"). If I were to found a religion called the "Church of Jesus Christ of Bank Robbers", would that make bank robbers "christian"? Jesus changed water into wine, but LDS do not touch alcohol (in theory, I've known a few that do, though), so there is a discrepancy there as well.
I'm not saying that LDS are not "christian", just that you do need to come up with better arguments to back up your claim.
Blessings on your Journey!