I am not surprisied at the sundry answers here. The Amish, like many other reglions, have many different sects. Thus, you find different beliefs among them, depending on where they reside.
Last summer, relatives from Alabama visited our home. They asked if it were possible to visit Pennsylvania, specifically the amish community. We spent a day or two in the area before moving on.
During our stay, we had the opportunity to talk with several of the amish men. One elderly gentlemen enlightened us on their way of life. While so many people believe they don't this or that because it is a 'sin' is incorrect. Their lifestyle is based on their ancestors. The 'simple' way of life which suited grandpa suits them. They don't own cars, however, they will not hestiate to let a friend or neighbor take them for a ride into town if needed. They don't use electricity--why? The prefer not to have electric lines running up to their houses because it 'links' them to the outside world. The bible teaches that they should be seperate themselves from the world-they do this by retaining the simple lifestyle as passed down to them. Some sects of the amish do not have church buildings; they worship in their homes. Each family of the congreation will offer their home for Sunday worship on a rotating basis.
Here in my state, we have some amish. They are different than the amish in Pennsylvania. For example, they have church houses. I have driven by on several ocassions to find numerous horse & buggies tied to the hitching post outside a wooden church house. Although they dress very similiar to those amish several miles north, there are some slight variations too.
While, most have babies at home...I would say, that circumcision is not something they practice.