[gorwell]

"It feels like a small group"

You're right, it's only about 5% of the population, but they occupy administrative roles inside organizations and reshape them according to their fundamentalist beliefs. They are convinced they are doing good and have moral authority. As such, they have no qualms about ostracizing or firing dissenters. People are terrified of that and go along with it for fear of retaliation, so it seems larger than it is.

Taking administrative roles with an intolerant belief structure and chilling effect on speech is how the Successor Ideology is so effective despite being small in number.