re: USA as armed camp
When somebody who slipped over the border blows something up, are you going to be in the vanguard of those screaming at the government about why they didn't DO something about this?
Only if it's the result of incompetence or corruption, both of which must be proved, and both of which are actionable.
Living in a free society has its costs. We like to think we are safe. We are not. When we seek safety by walling ourselves up and spying on each other, we will no longer be free. Pick.