We past that point decades ago. The Mexican government is just as corrupt as our government which is why you see a ramp up of activity south of the border and they're bold enough to want to spill the violence on this side of the border. The governments on both sides of the border may be so corrupt that they're actually quietly encouraging the violence.
Interesing how most other countries in the world have no problem understanding when their border security requires military intervention. Example:
Tracker: Saudi Arabias Military Operations Along Yemeni Border.