A Pastor from the Confessing Church:

"When they came for the gypsies, I did not speak, for I am not
a gypsy. When they came for the Jews, I did not speak, because I
wasn't a Jew. When they came for the Catholics, I did not speak, for I
am not a Catholic. And when they came for me, there was no one left to
speak." -On the Wall at the Holocaust Museum in Washington