But in the US, when you have two separate cultures, each with its right, each of which has come to exist in this political entity in the last couple hundred years, each feeling like, "I have the right to hold onto my culture," and that's what makes it difficult.

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.

Call-and-response style, yes, exactly. So whenever different groups get together then there has to be this long period of negotiation. How will we worship? What's acceptable? What's not? If I want to say "Amen" can I?

And then they would have the shoe removers on one side, and the non-shoe removers on the other side until they could work through coming to understand why we might both be trying to worship authentically, and because of our cultural background we have these different ideas. But it took a while.

If we go into white congregations, non-whites will sometimes say it felt like worship never started. It was sort of dead and didn't feel that warmly received. But so - and there are different realities either way, and it makes it difficult for all groups to try and cross boundaries.

I certainly think so, and I argue so, and I give talks on that. Are there risks by putting people together? Absolutely. Is there value in the black church? Absolutely. Is there value in having immigrant churches? Absolutely. But if we don't have congregations gathering with people of different races, what we're doing is we are redefining racial division, a racial inequality.

They could never go back to being a uniracial congregation again. It brings excitement. It brings life. It allows them to be able to know people they would never know, to meet people that are outside the congregation they would have never connected with, you know, through the networks that they developed in the congregation.