The probabilities of active shooters continuing to do their evil deeds here in this country are way too high; in addition to trying to contain the shooter(s) and prevent further death/injuries, we are also tasked with tending to & evacuating wounded. I know that YOU KNOW first hand, Ron, the dangers of tending to & evacuating wounded people while under fire. The first task for an MRAP would be to immediately provide cover to evacuate wounded under fire. This is our standard protocol.
Militarization of federal agencies IS a concern...state/local agencies, not so much; we have too many other things to worry about than trying to become like the military. If local thefts & burglaries are out of control but yet the local LE agency is ignoring it to purchase MRAPs and practice SWAT tactics, that sheriff/chief isn't going to last long there and there WILL be a change of command and change of policing...locals will be burning up the phone lines & taking over council meetings with their local elected reps to bear pressure on the LE chief/sheriff to bring about a change in priorities. Especially if that LE CIC is elected vs. appointed.
My agency has specific plans AND TRAINING for all patrol officers to undergo and understand in the event of a major catastrophe and/or active shooter. And NO, it does NOT include going door-to-door to confiscate legally-owned firearms nor FMVs...there aren't enough police officers in the world for that, it is logistically impossible.
Yes, I carry my own AR15 rifle on duty. After 8 years in the USMC (including being a PMI), 21+ years of big-city law enforcement experience, years of being an NRA-certified LE firearms trainer, and having to qualify with my rifle at the range EVERY 3 MONTHS, wouldn't you feel better with someone like me carrying a rifle & tactical gear on duty, or would you rather have someone just out of college with a worthless criminal justice degree and no life experience showing up with those "special" federal acronyms all over themselves? Not to mention that as an NRA Life Member, MVPA member, and a resident of the community I serve, I do NOT want to see the so-called "militarization" of police agencies below the federal level...we have too much to lose. I also don't see it happening...we are simply trying to be better capable of responding to military-type threats without having to wait hours or days for the feds or military to respond.
Research what happened in Mumbai as well as the LAPD bank robbery around 1995, and the recent Kenyan mall massacre. We don't want those to happen in our communities.