That said, were the Mexican government fundamentally change from being a belligerent narco state. End its government sanctioned support for the narcotics; hostilities against the United States and actively seek to destroy the narcotics industry and request our advice, logistics aid and support to do so then I would absolutely give them the exact same plan for dealing with the heroine industry within their country.
The Mexican government, military and law enforcement alone would be involved with carrying out "the plan" to eradicate the heroine business within their border.
Unfortunately, the above scenario is highly unlikely. Hence another overwhelming reason and need to "build the wall".
Amen on the wall.