It is, yes, but there is also a difference between "I believe what I've been told and raised with" vs "I saw God, he spoke to me personally, and Angels are real

It is, yes, but there is also a difference between "I believe what I've been told and raised with" vs "I saw God, he spoke to me personally, and Angels are real." Obviously there is grey in between. Susceptibility and gullibility are NOT the same as delusions. This also applies to the low end of the Sovereign Citizen movement too - not all are delusional, some are just naive or easily misled.