It's always nice when someone who knows nothing about the Amish, has suggestions for how they should change their lives and religion.
They are pacifists. They are bound to this pacifism by their faith in God. They are not going to become violent, even if their mortal bodies depend on it.
your right and we just have to respect how they want to live. But I bet you after this nightmare that clan of Amish may think otherwise.
Personally to each our own. If you don't want to defend yours or your families life it is your choice. I on the other hand will fight if someone tries to harm me or my family!