Lots of wailing and gnashing of teeth because I have the effrontery to even ask, but only one answer...
mormonISM is not Christianity any more than sitting on the kitchen counter makes me a toaster.
Excellent Q...and one that the thread disruptors succeeded in temporarily sidelining it.
Let's answer the part of the Q about what it means to be a "Mormon" first -- from a contemporary Mormon worldview:
Mormon religiosity DEMANDS ritualistic hoop-jumping:
* Ya gotta be a member of the Mormon church, supposedly the ONLY TRUE church on the face of the earth (preaches Mormons) -- D&C 1:30 [that cuts things down to about .17% of the earth's population]
* Ya gotta have a Mormon "union" card -- what they call a "temple recommend" card...Can't live with God the Father forever without it.[that cuts things down to approximately .03 or .04% of the earth's population]
* Ya gotta be married (or widowed). No singles allowed to live with the Mormon god forever -- per Mormon doctrine. [that cuts things down to about .01% or a wee bit o'er that of the earth's population]
And then how many temple-recommended Lds go haywire -- or come to their senses -- in some way & become ex-Mormons, Jack Mormons, criminals, etc.?? [that knocks it down to less than .01% of the earth's population that might pass Mormon man-made hoops for living with the Mormon god forever...& that doesn't count any divine zots acomin' that weren't solved by a church membership, temple rec card, or marriage license!]
The bottom-line point in ALL of this: Mormons make it VERY CLEAR that to be a TRUE-BELIEVING Mormon eligible to live with God forever is an exclusive club membership Only!
Don't mess with country-club religiosity Greyfoxx! (That former "White boys only" club doesn't like meddlin'...and they've sent the anti-meddlin' preachers your way)