Dk, are you off your meds again?
Seriously, are you saying that we need to have the armed forces sitting on the Mexican border ready to respond instantly to someone shooting at a couple of morons? If you remove the border aspect, this is virtually identical to something that happened in the mountains of East TN about 3 months ago, where a couple of drug dealers ran into the arms of the cops with other drug dealers in hot pursuit. This was a 10-minute exchange of fire - how close would the military have to be to respond in time?