Perhaps in a country with a homogeneous religious culture it’s easy to dictate dogmatism, and while the US might be religious compared to perhaps Europe, it is not homogeneous. I’d argue that you could take two different congregations affiliated with the same denomination and probably find topics or scripture that would create fierce debate between the two.

Birth control might be a big deal to some devout Catholics and some primitive/fundamentalist Baptists, but virtually every other denomination and congregation is literally not going to care.