The earlier kkk may have been anti-catholic, but they considered themselves very religious protestants. Catholics and protestants have a long history of killing each other actually, but in any case you know well what I was saying and you also know the point is not any less valid. Pick any nutcase group you wish that espouses Christian ideology - there have been plenty over the years, and make the same analogy.

Most if not all organized religions have plenty of blood on their hands. You saying "look at what Jesus vs Mohammad did" is also a religious argument, arguing your religion vs theirs. And while there is nothing wrong with that, bringing it into a political discussion in the USA is not particularly compelling - unless you/your groups also have a goal of setting up a theocracy like Iran has. In which case, comparative theology suddenly becomes very pertinent.

For who could be free when every other man's humour might domineer over him? - John Locke (2nd Treatise, sect 57)