Muslims definitely have a PR problem, and Mormons have the polygamy legacy, and probably some baggage from the door-to-door pitch, but there's also a vein of thought among some Christians(TM) that the freedoms and prosperity of America are direct blessings from Jesus, and are somewhat conditional on Americans having accepted Him as their Savior.
In this mindset, there is no equivalence among religions. America is a Christian nation, and Christians have a predominant role to play, and letting others follow the Pope, or some false doctrine, or wallow in ignorance/defiance of Jesus' divinity (in the case of the Jews) threatens us all.
I lived in Oklahoma City for a short time, and besides curing me of my tendency to look down on Wyoming, I always wanted to ask the locals why God keeps punishing them with those tornadoes.