There's an interesting parallel here by Nassim Taleb, author of several books the most famous of which might be The Black Swan. In this article, a chapter from an in-progress book, he contends that the most intolerant faction will eventually come to dominate. In the article he's talking about extremist Muslims but it could just as easily be extremist Christians or extremist white nationalists.

https://medium.com/incerto/the-most-intolerant-wins-the-dict...