For that matter, when you think of the Amish and the other "Swiss Bretheren" religions, why do you think "Pennsylvania" rather than "Switzerland and neighboring countries"? A sect that had to cross oceans to find a state promising religious freedom is our best example of humans' high tolerance for diversity?
Yes, that's a good point, although now that I think about it I don't actually know what happened to the 'original' Amish. The Wikipedia Swiss Brethren mentions a lot of persecution, but it also says they sort of survive as the Swiss Mennonite Conference; regardless, they clearly don't number in the hundreds of thousands or millions like they do in America.
Related Posts: A cynical explanation for why rationalists worry about FAI, A belief propagation graph
Lately I've been pondering the fact that while there are many critics of SIAI and its plan to form a team to build FAI, few of us seem to agree on what SIAI or we should do instead. Here are some of the alternative suggestions offered so far: