From a protestant clergyman in Germany in the late 1930's

 

"When the Nazis came for the trade unionists and socialists, I said nothing because I was not a trade unionist.
When they came for the homosexuals and the gypsies, I said nothing because I was neither. When they came for the Jews, I said nothing because I was not a Jew.
When they came for the Catholics, I said nothing because I was not a Catholic.
And when they came for me, there was nobody to say anything for me."

If you think it will not happen here, just look at our shameful past with slavery.
The United States Supreme Court did affirm the right to own slaves.