I have a hard time referring to them as Christians when they think that the non-Latter-Day Christians are someone that needs converted. They sure send a lot of missionaries to go after (other) Christians. They sure seem to teach that you have to be part of their church. In short, they sure seem to act like they regard other Christians as "other".
So, no, I have a hard time calling them "Christians".
(And if you're going to say that they self-identify as Christians, well, Jesus said something about "Not everyone who calls me 'Lord, Lord'...")