In reality every Trump voter has their own reason to behave this way. And their behavior is perfectly rational according to their own beliefs. My personal theory is that we have been grossly underestimating the potency of misinformation and disinformation propaganda on social media. Especially those which weaponizes peoples actual grievances with authority, and directs them in this way. Anybody can be a victim of misinformation (we see this in action with people that fall victims to scam), the misinformation you personally don’t fall victim to was probably not directed at you (see e.g. the Nigerian Prince filter for wire fraud scams).

I think that even though humans are smart, and we have our own agency, there are also number of ways which our intelligence can be exploited. This is the case for scams, but also for misinformation propaganda. I think the real lesson here is in the failures of our democratic institutions to protect us from this exploitation.