A series of right-wing movements made up of extremists who want to "purify" America by attacking and killing those they consider unworthy which includes people of ethnic minorities Catholics and Jews. The first incarnation was established during the 1860's and died out a decade later. After D.W. Griffith's "Birth of a Nation" film romanticized the original Klan, a second incarnation was born after 1915 becoming swiftly popular during the 1920's....