Actually I'd say there is much more similarity to the way Europeans of various varieties of Christianity behaved towards each other during the Reformation and Counter Reformation period, which was a time of fanatical modernisation.   

My point is that it's a mistake to think of Jihadist Islamism as a hangover from the past. It's a new phenomenon, geared towards an imagined future. That's where its danger lies. (And that is something it does indeed have in common with Nazism.)