I have mixed feelings on the whole immigration issue. But it has been truly said that a country that can't control its own borders isn't a country. And there can be no question at this point that this is a matter of national security in the direst possible sense.
Donald Trump's mouth is bigger than his bank account, and his ignorant remarks about immigrants deserve all the scorn they're receiving. But it's not as if the problem of crime committed by these folks isn't real.