I don’t think it’s just trying to stay on the high road, it’s also because we see everything from a reality-based perspective rather than their faith-based one. Reality tends to be messy with no clear “right” answer, leaving its adherents with the unenviable task of choosing from several non-ideal options. Whereas, when you fully believe that you know the right answer, you don’t have to trouble yourself considering pesky facts or opinions of people which challenge your world-view.
They fight tooth and nail because they “know” they are right, while we “dither” because we can see legitimate arguments to be made for different courses of action. Since we are fact-based, we are reluctant to stand up and insist that our way has to be the best and meanwhile they don’t even see that there might be another option.