Napoleon did a lot to emancipate Europe from the old aristocratic order, granted freedom to many states, and spread liberal ideals; and yet he created his own dynasty and was harsh to the Germans. Genghis Khan slaughtered millions, but was kind to his subjects who did submit to his rule. Women had rights at a time when patriarchy has been dominant. He allowed religious tolerance and art and commerce flourished under his domain.

History is not as black and white as you think it is.