1. Joseph Smith primarily left Kirtland Ohio because the bank he started had failed and he bailed out.
2. The Mormons would like to blame Missouri mobs for the failure of the temple in Independence, MO, yet even the official Mormon Church curricula, Doctrine and Covenants Student Manual (1981/2000), says that besides the “mobs” another reason existed: ”...AND because the Saints at that time had not kept the commandments as they should (see D&C 105:1-9)” So even Mormon leaders blame the Mormon people!
3. The Mormons were in the Salt Lake Valley for about 30 years before the St. George temple was dedicated. (What took so long for those early Utah "pioneer Mormons" to be faithful to the Mormon gods' commands?)
Because, if you study church history you will learn that the dedication of the first temple at Kirtland, Ohio featured, appearances by Jesus Christ, Moses, Elijah, Elias, and numerous angels; speaking and singing in tongues, often with translations; prophesying; foot washing; and other "spiritual experiences."
Evil Gentile critics point out that the Saints had ginned up (pun intended) a mess of home brew and got loaded to the gills. The Holy Saints would later deny their own records and eyewitness accounts. But in any case, there is only so much of this kind of holy rolling that a body can take.
And now you know.