I personally find this idea pretty weak. The main problem I have with it is that these taboos are enforced precisely by the members of the group that would be

I personally find this idea pretty weak. The main problem I have with it is that these taboos are enforced precisely by the members of the group that would be the "weak" group now. As the most recent and obvious example, the #metoo movement has thrived with the fundamental support of powerful white men. The taboos of religion are, or were, not imposed by a powerful group of priests to a subjugated population, but instead they were enforced collectively. There is a taste, a natural instinct, for just conforming with mainstream opinions, not out of fear but with sincere conviction, sometimes beyond any logic and reason. Once some ideas get enough traction, and non conformity is met with enough execration, then people just tend to join in with real devotion.