That's the problem with putting control of our borders in the hands of law enforcement rather than in the hands of the military....where it belongs. When you're up against mounted machineguns, what do you do? The military answer is simple: Light 'em up....first. What are those federales in Humvees going to say with their mounted machineguns to a company of M1A1 Abrams tanks?
The Mexicans need a little history lesson: It took just the state of Texas (just about nine years before it was admitted to the union) to kick their A$$e$ at the Battle of San Jacinto in about 18 minutes. Remember the Alamo! Remember Goliad!
Don't mess with Texas. Don't mess with the USA.
They need to get some Strykers like Fat Billy is using on the NM border over there in Texas. Federales wont come over and mess with them........but once.
Ummmmmmmm call in air support, is the short answer.
They can do this every day of the week. What does a BP Agent have in his SUV that can take on crew served weapons?
Guys in mexican uniforms setting up fighting positions on US land...sounds like a valid military target.