well, yes technically they are correct. Quite frankly our country has taken a big part in !@#$ing up the rest of the world, along the British and Spanish.
The decline of the Spanish empire combined with our intervention of the western hemisphere has been the main root of the sh------- conditions of Central America. In additions with the criminalization of drugs, Central American kingpins benefit from Bush's coke days, Obama's Coke days, and Bill Jeff's pothead days. So, yeah it is fair to say that Americans are at a big fault for the cartels over the past 150 years.