Fanatics believe they are acting for the good of all. Their mindset it totally removed from our own, we will never understand it.
I wonder if there will come a time when they reflect and are horrified, or will they be able to come to some sort of accommodation with themselves as the Germans have, over the horrors of the Third Reich?
I read a book called 'Wilful Blindness' all about how cultures can make themselves oblivious to some horrific things, just as individuals can.
For cultures where life is brutal, I imagine that finer feelings are a luxury few can afford.