Maybe some voters who are inclined to hold Romney’s Mormonism against him will feel guilty when Romney cites the principle of religious tolerance. ~Marc Ambinder

Perhaps, but for them to feel guilty they would have to have done something they actually thought was wrong.  Not voting for Romney because of his Mormonism is not intolerance, and it is a measure of how distorted, or rather inflated, the concept of tolerance has become that strong disagreement over religion can be equated with religious intolerance.