The comment you responded to cited local support for cartels, not national. Also, the government is rightly considered responsible for cartel violence more than the cartels. Previous governments limited violence by managing cartels without fighting them.

"The government of Mexico is among the most corrupt and least trusted in the world"

That is an extraordinary claim that demands evidence. Mexico is an orderly, prosperous first world democracy with serious gang problems, not some African or Middle Eastern failed state.