I'm reminded of a poem;
First they came for the Socialists, and I did not speak out -
Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out -
Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out -
Because I was not a Jew.
Then they came for me - and there was no one left to speak for me.
I've always wanted to ask a racist what happens when the mob decides you're not white enough? Or your children? Or your grandchildren?
The one thing they can't say is "it will never happen" because history has shown us, it will. It always does.