I have had several brain surgeries and at some point in the midst of that I got meningitis. The pain that I experienced in the emergency room while they were trying to get me stable enough for transport reached into the deepest recesses of everything I ever thought I was and changed me on a fundamental level that is still incomprehensible. In between the unconsciousness and the involuntary screaming simply because my mouth was open I remember clearly thinking that torture would be easier because there would at least be someone to blame. At some point you'll say anything because you lack the sentience to seed thought.
I've also watched a lot of police interrogations and false confessions are all predicated on not having consulted a lawyer who can warn you about interrogation techniques that are designed for the purpose of fulfilling a predetermined or convenient narrative.
Maybe you won't confess or sell anybody out exactly but you will absolutely say anything a trained interrogator wants given enough time or pain.
I worked in community relations with FEMA for a few years starting with the Charlie, Francis, Ivan season. We had threats and used police escorts back then, especially in the rural areas or where there was a high population of evacuees. Our training included how to avoid packs of feral dogs and militia. We often had to hide our insignia the second we weren't on strictly official duty. There were guns flashed and one shooting that I'm aware of. I personally got screamed at in stores and parking lots fairly regularly. Many people expected we would just hand out checks everywhere we went but considering I was the first person to contact many of them, the best I could do was hand them brochures and tell them where to go for an application.
After Katrina and Rita in New Orleans my friend was the first hellicoptered in with bulletproof gear on and we had National Guard escorts everywhere.
Sometimes the worst people were in rich neighborhoods with a few things on their front lawn from their flooded basement. They were very angry because their insurance didn't cover them and they had enough income that the government would either not provide any money, or they didn't think the cap of $1400, or whatever it was, was enough for them. After talking to people who lost literally everything, including family and were bussed to a state they'd never been to before, these people furious about their furniture were difficult to tolerate. But, that anger was very real regardless of how they came to it and it doesn't surprise me in the least that it might fuel even more distrust of the government.
I saw many things poorly handled that I could never excuse, but the nature of massive disasters is confusion and chaos. It's an incredibly difficult situation for everyone.
I think the biggest problems I ran into were just a general misunderstanding of what FEMA is and what they do. I even have a tshirt from a local that says "Fix Everything My Ass". Ironic for me because of course, that's not what FEMA does but it is exactly what people expected. Hard enough to correct under the best conditions but then we had critically limited communications and the local news would fire up the outrage, sometimes with outright lies. It's natural to look for patterns and easy solutions in chaos, it's also good to be skeptical of authority. Those things combined in an environment that is changing so quickly even the people "in charge" can't keep up from moment to moment, is perfect for fostering conspiracies.
The militia and Klan folks only needed an excuse.