Black Legion

When machinist Frank Taylor (Humphrey Bogart) is passed over for a promotion in favor of a young Polish immigrant, he's outraged. It's not long before an ultra-conservative, pro-American, secret society called the Black Legion recruits Frank to join their cause -- terrorizing local immigrants in an effort to keep shops and businesses strictly American owned and operated. Soon Frank is involved so deeply within the organization that he cannot keep from getting swept along into a series of brutal attacks, and eventually, murder.