Also, the US mil is notorious for wreaking ecological havoc and environmental disasters, and poisoning enlisted personnel. (Ask my dad how that Agent Orange exposure was on the flight line.) This is par for the course.
While I won't disagree (lost an Uncle to Agent Orange related cancer), it makes sense that the military won't run these vehicles with extra emissions equipment on them. Besides not being suited to running JP8 fuel, the mechanisms just aren't mature yet. The reliability isn't up to par and it wouldn't do to have vehicles hit a regen cycle or enter limp mode at a bad time.
There is non-trivial chance that once these enter the civilian market (say, via a government auction), there will be a requirement for the buyer to add the emissions control components back.
You can run normal diesel engines on kerosene (which is what jet fuel mostly is); the issue is that kerosene is less lubricating to the mechanical parts in the fuel-delivery system than pump diesel. This was a bigger issue back when mechanical injection was the rule. The solution is to pour a pint or two of automatic transmission fluid into the tank with every thirty gallon fill up.
Of course, the EGR, SCR & particulate filter were never designed for this setup, so when you convert a modern pickup to run on kerosene, those systems are blocked off, removed (w/ a sawzall for the dpf), a new exhaust is fitted and the ECU can be remapped with more appropriate settings.
Also, the US mil is notorious for wreaking ecological havoc and environmental disasters, and poisoning enlisted personnel. (Ask my dad how that Agent Orange exposure was on the flight line.) This is par for the course.