In Germany They First Came for the Communists, Martin Niemoller

"In Germany they first came for the Communists, and I didn't speak up, because I was not a communist. Then they came for the Jews, and I didn't speak up, because I wasn't a Jew. Then they came for the Catholics, and I didn't speak up, because I was a Protestant. Then they came for me, and by that time there was no one left to speak up for me." - Martin Niemoller, 1945 (WW1 war hero & U Boat Captain, WW2 pastor who spent 7 years in Nazi prisons).

This is one variant of the quote by Martin Niemoller. Variations include trade unionists, social democrats, and others. We are now observing orders in the U.S. aimed at Muslims, with the false idea that all Muslims are terrorists - an idea as wrong as the idea that "all blacks are bad", "all blonds are dumb", "all ____ are _____."

You can view this and some of the variants at https://en.wikiquote.org/wiki/Martin_Niemöller, or Google Martin Niemoller for more links.