I've been thinking about this a lot, after reading some background on Ashli Babbit. I do believe that Trumpism is a cult, and like other cults, it preys on unstable people. This MAGA nonsense is pulling back the curtain on a huge mental/spiritual health crisis in the US. (As TwoWayMirror points out in the comment on rural America.)
There are millions of people who don't find meaning in their personal lives and are looking for a narrative to give them meaning. A "crusade", even, with all the repellant connotations of that word. Many of them are susceptible to demagogues and snake-oil salesmen.
https://www.nytimes.com/2021/01/07/us/who-was-ashli-babbitt.html