Pastor Martin Niemoller, Congressional Record, October 14, 1968 (Vol. 114, p. 31636)

When Hitler came for the Jews… I was not a Jew, therefore, I was not concerned. And when Hitler attacked the Catholics, I was not a Catholic, and therefore, I was not concerned. And when Hitler attacked the unions and the industrialists, I was not a member of the unions and I was not concerned. Then, Hitler attacked me and the Protestant church ? and there was nobody left to be concerned.