In the 19th century, the Mormons were persecuted and driven out of towns and communities (including the Federal government) all across the country until past the Rocky Mountains at an area where they were allowed to basically be themselves. (No other reason why a civilization would by choice be cultivated and flourish around a bigass salt lake.)
Why the violent reaction to them by America? Polygamy, a marriage practice that's been practiced by countless people across distant lands over thousands of years. And one that in itself, I have no philosophical qualms with. (Though why one wants 3 nagging wives instead of 1, I don't get. :p) But not OK with the Protestants back East.
As a Mormon, myself, the above is certainly true. Fast-forwarding to the present, what I've found rather ironic is, when you mention polygamy to those who go on about the rights of gays to marry, their reaction is, "Uh...er...well...."
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