Neo Deist
Th.D. & D.Div. h.c.
There are no "border laws" or "INS laws" there are just laws. I want to believe that most police officers will arrest law breakers and not try to decide who should or should not be arrested. That's for the courts to decide.
Up until recent years, oral sex between consensual partners (think husband and wife) was illegal in 14 states. My wife and I used to break the law several times per week. Was I morally obligated to arrest myself and her? Not that I wouldn't mind her being in handcuffs...
If the speed limit is 40 and you drive 41, should I pull you over and cite you?
If you don't use your blinker to change lanes on the interstate, even when no one is around, but I see it from 1/4 of a mile away, should I pull you over as well?
If you think cops should enforce all laws just because they are laws, prepare to be disappointed. Like it or not, there is officer discretion.