My current best guess is that the Mitt-haters are motivated by their belief that Mormonism is demonic and that this trumps all other considerations.
They believe that the GOP, by nominating Mitt, has literally made a pact with Satan and must therefore be opposed to the utmost.
then tell us which group of Mormons you believe to be the true church so we can direct any of our mormon bashing at them ~ no sense on wasting it on a bunch even you think are members of a false mormon church eh!