Or

“Why?' Said Harry. 'For the big idea, Oliver. Someone comes up with the big idea - could be religion, could be politics, could be the race you belong to, or your clan, or philosophy, or economics, or your sex or just how many bleeding guineas you got stashed in the counting house. Doesn't matter, because the big idea is always the same - wouldn't it be good if only everyone was the same as me - if only everyone else thought and acted and worshipped and looked like me, everything would become a paradise on earth.
'But people are too different, too diverse to fit into one way of acting or thinking or looking. And that's where the trouble starts. That's when they show up at your door to make the ones who don't fit vanish, when, frustrated by the lack of progress and your stupidity and plain wrongness at not appreciating the perfection of the big idea, they start trying to to shave off the imperfections. Using knives and racks and axe-men and camps and Gideon's Collars. When you see a difference in a person and can find only wickedness in it - you and them - the them become fair game, not people anymore but obstacles to the greater good, and it's always open season on them.”
― Stephen Hunt, The Court of the Air