So did Alexander the Great, most generals of the Roman Republic, Julius Caesar, the previously mentioned Richard I [at least Chingghis spent a good deal of his time in his kingdom], the Crusaders, the Muslims, Tamerlane, Napoleon, and all the happy Christian participants [both sides] in the Thirty Years War. So when it comes to horses in history, climb down off yours.
Compared to western "civilization" [remember Adolf Hitler and Joseph Stalin?], Chingghis Quan is small change. And the pluses of his Empire outweigh the minuses.
So you say. Temugin was a murderous bastard whose appologists have made him something he wasn't. Other's sins don't wash away his.