Related Information for Antagonist 1. New Zealand metalcore band. The band changed their name in 2008 to Antagonist A.D. to avoid to confusion with other bands holding the same name.2. Antagonist are a metalcore band from Whittier, California in the United States.In the rapidly changing and evolving world of heavy music, bands come and go faster than you can get a value meal at a fast food restaurant. Finding bands who are still slugging it out after a decade is a rare occurrence. What’s even more uncommon is find.. read more