I always enjoy your posts because you don't go off on knee-jerk tangents.
With that out of the way, let me ask you this: do you think that adherence to Christian beliefs should be a litmus test for holding public office in the United States?
You alluded to folks running for public office with the intent of Islamicizing America. My argument would be, they wouldn't get very far past local elections unless they were able to convince the rest of the country that we should institue Sharia law here. I don't see that happening.
The point is, religious beliefs of any sort, or lack thereof, shouldn't be any kind of test, unless you're looking for that. Secular adherence to the law means everything.
I believe that Americans have become conditioned to accept the lie that it's possible for someone to believe in "nothing" (secularism). There is no such thing as 'unbelief'. We all believe in something that shapes and molds our lives. As for who has spread this lie, I'll 'ping' you to my essay, "Who Is Queering America And Why?"