Highly Exclusive
Most religions want to recruit new members, but that’s not true for the Amish. They reject evangelism and make it tough to join their community from the outside. Many times, people who support the Amish aren’t actually allowed to enter.
Non-Amish English
People outside the Amish community are called English. That’s not done to be rude; it’s just the way they differentiate from the outside world. Many Amish trust English neighbors as points of contact during an emergency.