The Government and the cartels fighting for control. Wanna bet as to who wins?
I think I can guess but regardless, with your screen name I suspect you have more insight than me!
I have read that part of the problem Mexico faces comes from its successes in the drug wars. As the major cartels have been broken, less “disciplined” new players have risen to take their places. Smaller and much more violent. The leaders of the old cartels were violent, but they knew tourism brought in big bucks, so the tourist areas were safe. That’s gone now.