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mexico and usa have a very very close culture.

just like during all the 19th and a bit of the 20th century USA immigration was dominated by Irish, Italian, and other europeans. Mexican's have been the largest source of immigrants into the USA... and this is also as an aside of parts of USA which were part of mexico at one point (Texas, etc..)

as a mexican I'm aware that the biggest drug cartel in the country is the same thing as the government. this is specially true at lower levels of government; but then I went on to learn that the biggest drug cartel in a worldwide level are actually the american government, I understand this may be impossible to accept for a few people.

as a mexican from veracruz, I KNOW as far as I can know (meaning I don't know, but I guess) that the state's executive was controlled by the zetas cartel (first decade of the 2000s)

final tidbit: the technical name of Mexico is "United States of Mexico" (in spanish, clearly)