Won't be locals manning the MRAPS. They'll be from Guatemala and South Central LA and they won't give a rat's behind.
They will have a harder time pulling that on Americans than Americans/Russians/British had trying it in Afghanistan.
If it comes to jackboots manning armored vehicles, one would be foolish to attack them when they come looking for a fight.
Instead, wait. And wait. And wait. At some point, they have to come out of that MRAP. They will be tired. Not itching for a fight anymore. Just wanting to go home. They will want to be anywhere but inside that MRAP - they wanted a fight. They wanted to hurt people. Not sit in a cramped, smelly MRAP without food or water. Make them stay in it. Don't fight them while they're in it. At some point they have to come out.
Make sure they don't go home.
Of course, if it comes to that...