si usted tire a criminales sin causo suficiente por las leyes en su estado, usted va a la juzgado.
Like it or not using deadly force in apprehending misdemeanor suspects, discharging fireams at occupied vehicles is not going to be looked on with great glee by just about anybody down there. Now it's fine to bloviate from Virginia, but there are some realities to deal with. That's why Simcox and the others are keeping their Minutemen groups on real tight leashes. And if there are members that are more heavily armed than the group leaders are aware of, they very likely will be given their walking papers. Is that risky? hell yes, but that goes with the territory.
Do many of the Minutemen speak spanish? probably enough to get along, with enough linguists around to keep most out of trouble. And a lot of Mexicans from the border areas speak some english.
The Mexican soldiers are likely not going to cause trouble if they know they are on the wrong side of the border. Smugglers of people and drugs will likely have no compunctions in using force. You can expect that the Mexican government is going to try and leash up both the military and smugglers to the best of their ability. It definitely IS NOT in their best interests to have an incident erupt forcing the US government to crack down even further or even take military actions. And nobody wants some buckaroos down there trying to start a real war.