Over time, idiosyncratic behavior tends to develop into splinter communities that are just as strong as the original, if not more so. Look at the history of LGBTQ+ subcultures and you can very much see that happen.

That usually happens in cities and this occurs as a consequence of reaching a critical mass of individuals with whom one forms a subculture. You can find thousands if not tens of thousands of kooks in New York City that will share any given outlandish belief. That's a benefit for cultural diffusion, but a disadvantage for cultural cohesion. In contrast, the weakest areas for LGBT representation are rural areas which already have a tight-nit church-going society and dominant Christian subculture. Communities with the strongest cultures are the ones are least likely or be changed or influenced by others.