You claim to understand law enforcement yet you bitch and moan when the authorities do their jobs. In the case of the Santiago restaurant the authorities were operating on a tip of possible document trafficking ring. Documents traffickers are criminals that could be armed to the teeth and you want agents to go in with their hands up their butt like this:
while people available do:
Agent: Excuse me are you a document trafficker?
Person: X: Oh GOD no!
Agent: Are you illegal?
Person: X: Oh no, certainly not!
Agent: Sorry if I offended you nice legal foreigner.
Person: X: No problem officer.
Agent: Oh Okay thank you. Enjoy your meal and have a great rest of your evening.
Agent: Okay boys pack it up these nice truthful people are not illegals nor document traffickers its all good. Apparently we were lied to. Lets go...