If a beggar 
sticks his head in your garbage can, call him a thief.

   I know this analogy isn't an exact one. Yes, it is illegal for the beggar to come on your property and take something out of your garbage -- just as it is illegal for an immigrant to come into America without proper permission -- but taking something out of a garbage can can be different than coming to America.
   Or is it? They take jobs no one else wants. That is much the same as them taking something out of a garbage can that no one else wants.
   But, some of those jobs people do want. The argument is that they take jobs away from the native-born. And, there is the matter that not everyone coming to America comes to take jobs. Some would suggest a leading reason they come is to take advantage of our welfare and medical systems.
   That is hardly like taking garbage out of a garbage can.
   Still, the analogy is correct in the point it is trying to make: A beggar taking something out of a garbage can is doing something illegal. If we become obsessed with sending the undocumented back simply because they are doing something illegal, isn't that much the same thing as crying, "Thief! Thief! and calling the cops on them for breaking into our garbage cans?
   These are the poor, these immigrants. Make no mistake that there is a likeness. We are as one crying "Thief! Thief!" and rushing to our phone to call the cops.