Of course that scenario does have somewhat less threat in this country where politically active religious extremists already have effective control over one of the two major parties....
Please tell me you're joking? If not that is absolutely hyperbolic nonsense.
Sure, States. The religious right has almost NO influence whatsoever on the GOP's hard-line social conservatism.
To call them "extremists" is really inane hackery. Westboro Baptist Church is extreme, mainline Protestantism and Evangelicals aren't really extreme. Very very very few of the Christians involved in politics at the moment are pushing for any sort of theocracy that you'd imagine in your head. And don't use me as any sort of example, I'm outside the scope of the normal political spectrum, just like most of the leftists here are.
Being pro-life, pro-family and other social conservative positions are not "extreme" by most any standard in this country.