A cogent argument for isolationism

It would appear that some members of one of the world’s more more vibrant cultures fail to fully appreciate the willingness of the U.S. government to encourage the mass migration of their fellow citizens or its position on the evils of certain pharmaceuticals:

A spray-painted sign threatening death for U.S. Drug Enforcement Administration agents was found Friday next to a school in a northern Mexico state capital, officials said. Addressed with profanity to “Gringos (D.E.A.),” the unsigned graffiti warned: “We know where you are and we know who you are and where you go. We are going to chop off your (expletive) heads.”

One wonders how long police enthusiasm for the drug war will persist once they find themselves actually fighting the sort of war where they are no longer considered off limits. Why would anyone in Mexico even have an opinion on U.S. agencies if said agencies were not interfering in Mexican internal affairs? One tends to doubt many Mexicans harbor similar ill will towards the Dutch equivalent of Housing and Urban Development.