For example, if the threat model is that they just adopt the dominant ideology around them (which happens to be false on many points), then that results in them having false beliefs (#1), but may not cause any harm to come to them from it (#3) (and may even be to their benefit, in some ways).
Many Communist true believers in China met terrible ends as waves of “political movements” swept through the country after the CCP takeover, and pitted one group against another, all vying to be the most “revolutionary”. (One of my great-grandparents could have escaped but stayed in China because he was friends with a number of high-level Communists and believed in their cause. He ended up committing suicide when his friends lost power to other factions and the government turned on him.)
More generally, ideology can change so quickly that it’s very difficult to follow it closely enough to stay safe, and even if you did follow the dominant ideology perfectly you’re still vulnerable to the next “vanguard” who pushes the ideology in a new direction in order to take power. I think if “adopt the dominant ideology” is sensible as a defensive strategy for living in some society, you’d still really want to avoid getting indoctrinated into being a true believer, so you can apply rational analysis to the political struggles that will inevitably follow.
I should also address this part:
Many Communist true believers in China met terrible ends as waves of “political movements” swept through the country after the CCP takeover, and pitted one group against another, all vying to be the most “revolutionary”. (One of my great-grandparents could have escaped but stayed in China because he was friends with a number of high-level Communists and believed in their cause. He ended up committing suicide when his friends lost power to other factions and the government turned on him.)
More generally, ideology can change so quickly that it’s very difficult to follow it closely enough to stay safe, and even if you did follow the dominant ideology perfectly you’re still vulnerable to the next “vanguard” who pushes the ideology in a new direction in order to take power. I think if “adopt the dominant ideology” is sensible as a defensive strategy for living in some society, you’d still really want to avoid getting indoctrinated into being a true believer, so you can apply rational analysis to the political struggles that will inevitably follow.