Immigrants are just the first wave of scapegoats.

I refer you to Martin Niemöller's famous confession:

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.

ICE is the modern American SS. They just need an excuse to arrest people arbitrarily - until they don't need an excuse no more.