Correct. Amish are Mennonites who shun other Mennonites. The elders of their church decide for the local congregation what is and isn’t appropriate conduct. If you disagree, you are shunned.
I know this is pedantic, but that’s just not right. Amish and Mennonites are generally distinct. One group does not belong to the other, though some groups in the middle claim to be part of both. Regardless, the umbrella term for both is “Anabaptist”.
If the congregation down the road disagrees, those folks are shunned.
I’ve not known there to be much animosity between neighboring groups, but I guess I haven’t witnessed an Amish church split up close. I know they happen though, but all Anabaptist groups in my area are quite friendly with one another.
Shunning seems to be more of a way to have their own members conform to their local rules. They really don’t care what others in the community or neighboring Christian groups do. I think it really is a control mechanism – e.g. “Do things this way or you are going to lose your family/friends/community support”.
(Source: My dad grew up Old Order Amish, his family was kicked out of the church (over some farming rules). My grandpa transitioned to be Beachy Amish at some point, while my dad joined a (now progressive) Mennonite church that I grew up and remained in for a long time)
That’s assuming that they’re authentic and not propaganda pieces…