As I said on the other thread, they could have been high, drunk, engaging in illegal activity or had a criminal history (in this case, one of them apparently had a warrant)
People do panic, especially when you have a warrant, and you take a wrong road and end up at a big monolithic gate with police cars and people in body armor, dogs on leashes, holding automatic weapons, and they are all looking at you.
If you have a warrant out on you, you might well panic especially if you are the driver, go up over a curb to turn around, whatever...
I am onboard with people feeling like we are in a police state, we are. But that said, these people who were manning that checkpoint may well have been on edge for whatever reason, and we may know nothing about it. There may have been threats, and mentally ill leftists are a significant threat at all times.
People have indeed been killed for stupidity (just a fact of life) and acting erratically in that environment is not something even the most mentally challenged person wants to do. Even if you do have a warrant out on you.
There is none of that at the Fort Meade gates. They look more like toll booths. People usually only see one guy in uniform standing outside each booth, checking ID. I haven't been there in six years, but in 2012 they only carried side arms while checking ID.
If you make a wrong turn into the gate, just drive up to the guard and tell him you made a wrong turn. He will tell you how to get out again. Follow instructions and there are no problems. Happens all the time. I did it myself, out of habit, after I had to turn in my ID card.