Yes, America has a strong Christian underpinning that still exists to a greater extent than in most Western nations. But there is a huge difference between that and the states you refer to: there is not state organized, state sponsored, state funded violence against other religions in America. And before you point out some example of that, the scale and examples (in both number and degree) are miniscule by comparison. The American Constitution had a separation of church and state, not because they viewed religion as bad, but to prevent the powers of state from being controlled by undemocratic church hierarchy and reserving it for the democratically elected state government that all citizens would share (whereas with religion, even within Christianity the was more than one "sect"). Many of the principles that the US was founded on were informed by the Christian beliefs of the founding fathers.