What I think jar was getting at is that you are implying causality when the best you can reasonably assume is correlation. To take one of your examples, Naziism, although it had some christian rhetoric associated with it, wasn't a specifically religious movement. It was certainly evil, but why do you assume that godlessness is the root of that evil?
You can associate Secularlism with Naziism, but it isn't a motivating factor in the establishment of the party or its actions.
Have you examined the other historical factors that created these conflicts/movements?
'Most temperate in the pleasures of the body, his passion was for glory only, and in that he was insatiable.'