The only reason its not illegal in much of the US (and, actually, the laws prohibiting it are on the books in a number of states but unenforceable due to federal action) is that would be Christian theocrats have been defeated by other political actors. Which is a certainly a good sign for the US, but hardly consistent with the idea that Islam is uniquely problematic and that Christianity has "outgrown" the same kind of repressive tendencies.

> America (arguably the most Christian nation in the world)

Maybe the most Christian first-world state with an area greater than 110 acres, but certainly not the most Christian nation in the world.