restricty boats. penniless, hungry dprit to become. >> they were considered inferior. polish people, jewish or southern italians. >> at the time many european immigrants were considered different races. >> people referred to people from ireland as a rest. people from hungary, the jews as a race. >> with new men enemies to hate, membership in the klan soared. some of america's most prominent men were under the hoods. >> hugo black was a member of the ku klux klan. >> until 1925. he went on to serve as a supreme court justice until 1971. back then, white supremacy was an elite movement led by some of america's richest and most powerful. they came up with a solution.