So different groups have different definitions, and then they clash on those. So it takes adept leadership to say we're going to work through these.

Once in a while you get people that maybe because of economic reasons, or have a social network, they get attracted. But it's a very tiny percent so that when we look at, you know, who are pastors and who are the head clergy of these congregations, they're overwhelmingly white, just a few African Americans, and those folks are usually called to what were formerly white congregations, or they started interracial church from the get-go.

We studied a mosque, and this is when we were at Notre Dame, and in this mosque they had people from a variety of countries, most of them immigrants. In some of the countries, when you go into a mosque you remove your shoes. To not do so could be punishable even by death in that nation. In other countries, it would be a great offense to remove their shoes when they come into the mosque, a sign of disrespect.

So we didn't get the denominations and the separate congregations really till about into Civil War time. What's happened then, of course, is now that we've had well over 100 years of this history to establish separate cultures, different ways of worshipping, and different ways of understanding theology so that when people try to come together makes it very difficult. And then, of course, social networks, you know, how do we find a place to worship?

So they actually put it into their mission statement, and they start changing things as a result. They may change how worship works. They may actively recruit folks and try and get them to come and help them to feel comfortable and get them involved in leadership, and there's a variety of ways.

I think it's pretty dynamic. There's a lot of energy there and life, and you'll have women dressed in their traditional African dress when they come, and you have people from all over the place, and some people have headphones on because they're listening in Spanish.

Humor is so culturally based that when I try to tell a joke as me being a white American, if I tell other white Americans, they'll laugh. If I tell an African American, they might not laugh. In fact, they either might not find it funny, or they might find it offensive, and I didn't mean it to be offensive. So these are the sort of little things that build up over time, just like in a marriage. You know, the little things can build up over time.