Should Group X have protective legislation?

I'm addressing the elephant in the room. No offense is intended.

Lets pretend that group X has been arriving on our shores in increasing numbers. They have small communities all over the US. They work and have families. A handful of disgruntled youths in group X have committed acts of barbaric inhumanity.

Suddenly, Group X is under heavy scrutiny by the public. Under the eyes of public opinion, they should all be collectively held responsible for the acts of the few. The food they eat, the religion they practice, the clothes they wear are mocked and used to portray them as backwards and primitive. Forces are organized against Group X. Soon, words turn to action and bloodshed.

At this point, Things have gotten horrific. The disgruntled youth of group X have grown and also be become more organized.

What is the government's ethical and legal response to this?

Serious answers only.