because thats what we are more or lesss are doing. 30,000 dead mostly the poor mexicans who the us gives armor and good weapons but get paid mcdonalds wages. which is alot for mexico. a teacher in mexico makes 3 dollars an hour. a mcdonalds worker in the us makes 8. so the result is that the battle trained (often former mexican military) cartel members are slaughtering the mexpolice with their aks and uzis etc/
even the us special forces, best in america, are getting boxed in by groups of cars and executed even driving in bulletproof armored cars. wont stop an ak full ak47 mag from breaking through.
if we do actually invade mexico with our marines, i think it would be a fair fight. cause the us/whover obamas drugczar is/ really underestimates the cartels.