The lesson of history is that whatever the government (or groups/companies affiliated with it) do today to a minority or to foreigners, they can & will do tomorrow to the majority in the home country.
Look at the Holocaust in WWII — more than just Jews died. Look at what the USA has done to foreigners — tactics used there get brought home & applied against our citizens.
In short, if you let the government treat anyone as less than fully human, they will sooner or later treat us all that way. Be an American — stand up for the rights of ALL people.