When you say "they" are you talking about the local US citizens doing these things, because "they" are doing it too. Comments like yours that word it so that it sounds like all crimes are being committed non-citizens which is such a fallacy it's laughable.
I used the word "they" on purpose, because the target seems to change often. It might be lower class, it might be immigrants (illegal and even legal), it might be $racial_minority, political faction, etc,. As long as it's a group that people can blame, it works.
