There definitely are absolute definitions of good and evil and most systems of belief are far from absolute about which they stand for. Look at the Spanish Inquisition for one example. Or Japanese internment camps. Or the American military involvement in Iraq beginning in the early years of this century. People have often been led by evil or wrong thinking men to do horrifying things in the name of religion or their country.
The tool used in each case is a population of unthinking sheep who will not think for themselves and who blindly follow someone who is charismatic and wrong. Tragedy inevitably results.
