1) We have no Mexican/American terrorist problem.
2) Isolationism doesn't work.
No? You've never heard of the Latin Kings, Latin Counts, Vice Lords, Ambrose, Rampants, etc., etc., ad nauseum? Their membership is in large part illegal alien criminals.
Take yourself and your family for a walk through what was a once fine American neighborhood that is now over-run by these illegal alien, criminal terrorists.
They'll show you and your whole family the true meaning of terror before they're done with you.