Chesterton on Religious Wars

"Oh, you kings, you kings!" cried out Adam, in a burst of scorn. "How humane you are, how tender, how considerate! You will make war for a frontier, or the imports of a foreign harbour; you will shed blood for the precise duty on lace, or the salute to an admiral. But for the things that make life itself worthy or miserable—how humane you are! I say here, and I know well what I speak of, there were never any necessary wars but the religious wars. There were never any just wars but the religious wars. There were never any humane wars but the religious wars. For these men were fighting for something that claimed, at least, to be the happiness of a man, the virtue of a man. A Crusader thought, at least, that Islam hurt the soul of every man, king or tinker, that it could really capture."

~The Napoleon of Notting Hill