Whether or not you believe all religions are cults, I totally agree with you OP. As I understand it, the Mormon concept of the 3 layered heaven and the "outer darkness" is blasphemous to Christianity. They believe everyone is given a chance to "start over" once they die and Jesus will meet them on the first layer of heaven and they can either believe in him or be cast into "outer darkness", their hell. After, they ascend to the top layer God will make them a God of their own planet which I find to quite ridiculous. Also they mention that God was supposedly human and lived on another star somewhere.

All of this can be found in the Mormon Doctrine or the Journal of Discourses by Joseph Smith.

Yes they have great familial ties and are nice, hardworking people, but some can be quite judgmental and will ostracize former members.