I posted a clip of 'The Campaign' earlier, which is a comedy spoof of US politics with Will Ferrell and Zach Galifinakis. It's ridiculous. But sadly, with Trump there are parts of that film that are staggering close to the truth. A Republican slogan in the film is "America, Jesus, Freedom" and he's asked what it means, to which he answers "I don't know but the people sure love it".
The bible means a lot to certain demographics in America. The right to shoot people means a lot to pretty much that same demographic. None of it really makes sense but you just have to be a Republican and say Republican things and they'll vote for you.