Well, except for entering the country illegally. That's sort of why they are thus labeled illegal immigrants.
The problem is that the left doesn't view it that way. They see it as an isolated error - like "Oops, I should have ordered the diet soda instead of regular". So let's just put that unpleasantness behind us and find a convergence zone for our feeeeeeeeeeeeelings.
Since they're thick as a brick I don't know if anything short of a sixteen ounce framing hammer can get it through their thick skulls.