When the pastor of a Dallas megachurch called the Mormon faith a "cult" and a "false religion" at a recent political rally in reference to the faith of two Republican presidential candidates, he sparked a media firestorm.

But while the Rev. Robert Jeffress used inflammatory language when he endorsed Texas Gov. Rick Perry for the nomination, his words highlight real differences between the Church of Jesus Christ of Latter-day Saints and the Catholic, Orthodox and Protestant churches.

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