The monks wear ritual clothing and use hand gestures and various musical instruments while praying for the spiritual and moral well-being of the people, for purification and peace of mind, to appease the wrath of evil spirits or to invoke the blessing of various Buddhas, Bodhisattvas, deities and rinpoches.
Allan Bloom, in the "Closing The American Mind, " said that we can no longer conceive of evil because the only word we have for evil is Hitler, and that's become much of the political discourse.