Revelation 20:14-15, that's why.
BTW, you didn't answer the question.
No. I wouldn’t vote for true-believing Satanist because he justifies an immoral worldview. However you can not say in any reasonable way that a true-believing Mormon would justify an immoral worldview. Thay my friend is where the bigots like to feed and live and that is where you find yourself.
You are not making any sense with your scripture reference.
Again Jesus paid taxes to a heathen and a herectic. Jesus supported the Samaritans (the old world equivalent to the Mormons) in their efforts to be recognized politically. Are you acting in contrary to the examples of Jesus?
Oh bye the way, I would have a problem voting for Catholic.
/sarc