This country was around for several generations before the basic concept of a "police department" even became a reality. What do you think people did before there were any "law enforcement officials" to speak of?
I'll tell you exactly what they did -- they carried guns around, and they enforced the law themselves.
It's not 1800 any more ..Your off base here buddy ..You're suggesting NY subway passengers carry guns and deny access to the subway to Moslems at gunpoint. That's a waste of time suggestion. Again , you're talking total chaos.