Texas

has several Mennonite congregations. Some of them are "plain people," meaning they wear the simpler clothing of a past century. The women wear head coverings. When I was a kid, their dress was even more severe, and they had horses instead of cars. Now they drive plain vans. They have modernized somewhat. The women work as LPNs and home health aides. Some work in schools as teacher's aides. There is at least one congregation in that community that wears modern clothing and seems indistinguishable from other Christian churches, unless you choose to visit and delve into their practices. One of the congregations in that community took out a full page newspaper ad a few years ago. It was sternly anti-abortion. I am no expert on Mennonites. I know only that I have observed those who live nearby since I was about ten years old. I have watched them change over time.
I think some of the congregations near me do encourage their members to be inward looking and self-centered. They live lives that are apart from the rest of modern society.