To a point I agree with you. All parties have their nutcases. But in the US, at least, the far right wing of the Republican Party seems to be infested with the hard-core religious . . . people, most especially the extremely conservative Christians.
And for the umpteenth time, atheism is NOT a belief system, but a denial of belief systems. Specifically, religious belief systems. Just like not believing in unicorns is NOT a belief system.