America couldn't wipe out the Taliban, Al Qaeda or any small time terrorist anywhere at the tune of trillions of dollars over decades, and this was fighting them in their own backyard..

Now imagine Mexican terrorists in your backyard, shooting up and bombing schools and federal buildings.
Mexico also wants to reclaim territory from the US, so they have an incentive.
America would see dust if relations with Mexico and Mexicans sourced to hellish mideast levels.
Dont believe the US propaganda of invincibility.
You don't want this..