You didn't have to be a practicing Jew to be rounded up by the Nazis. But to keep yourself from being collected, all you needed was to have someone provide you with forged papers to keep your Jewish heritage a secret, while you worked for the Reich, robbing Jews for the Nazis, and probably pocketing enough while you were doing it.
It's that "one drop of blood", that made a quadroon, whose skin was paler than most 100% Caucasians, a black" person.
When questioned by reporters whether fascism would come to America, Huey Long allegedly replied: “Of course fascism will come to America, but here we’ll call it antifascism.”