For me the answer is "not a damn thing." D.C. has a ton of immigrants from all over the world. So do the other places where I spend a fair amount of time. I've not lost a job to an illegal immigrant. None of them have come traipsing through the neighborhood. No lost benefits, no longer lines anywhere, and I don't see that my taxes have gone up so as I'd notice because of them.
Ask yourself:
What is the difference between somone seeing your front gate's "do not enter sign" and asking permission to come in the gate before opening and entering or someone seeing the sign and disobeying it and waltzing in without permission?
Then ask yourself why the disobedient one won't let you just come into his yard unnanounced without permission?
Now, ask yourself; what is the difference between someone ringing your doorbell and asking permission to come in your house compared to someone unexpectingly just opening your door or window and coming in unnanounced? What do you call an unannounced home invader?
Then ask yourself what is the difference
when the home invader steals your S.S. number, personal info, credit cards and Identity-is there a difference and what do you call the invader I.D. thief?
Then ask yourself: "Why won't this invader let me come in and out of their house anytime with their I.D.?"
Then ask yourself: why should the future people who ask permission to come through the front gate or ring your bell asking permission be punished or held from access to reach you all because of those who don't follow simple fair guidlines.
Now you were saying about what is the difference, well are you completely ignoring that you literally know this answer and practice it at home, business, and places you frequent? Get real.
*Folds arms like Run of RunDMC
*Drops the Verizon mic and walks away