Groups feel good for a reason that has little to do with the content of their beliefs. A group offers regulation. It supplies a ready-made sense of who is right and who is wrong, what to feel and when, whom to trust and whom to fear. For a nervous system that has learned to steady itself from the outside, this is enormous relief: the exhausting work of holding one's own orientation is handed off to the collective.
This is why disagreement inside a group so often feels less like an intellectual difference and more like a threat to safety. To question the group is to risk the very thing the group was providing — coherence, belonging, the quiet certainty of alignment. The cost of standing apart is not merely social disapproval; it is the loss of an external regulator the person may not even realize they had come to depend on.
Political and cultural factions intensify this dynamic rather than transcending it. They behave less like coalitions assembled around ideas and more like families fighting over an inheritance, because what is at stake is not really the policy in question but the stability the affiliation provides. The specific belief can change; the function does not. Each side is handed a flag and told the other side is the enemy, and neither is encouraged to ask who benefits from the division itself. The argument feels like engagement. Often it is a substitute for it.
None of this means belonging is a flaw. Humans are social, and shared orientation can be genuinely sustaining. The difficulty is the inversion — when alignment with the group becomes the primary source of internal regulation, so that the person can no longer tell the difference between what they believe and what their belonging requires them to believe.