"Why did you come here?" is one of Brand's first questions.
"It's our duty. ... To warn these people to stop sinning," they say to giggles and heckling from the audience.
"I just feel -- from what I've read of Jesus and what I've had explained to me -- that his main message was definitely tolerance and love and truth and beauty and acceptance," Brand says.
"You don't get to define the love of God," says Westboro's Steve Drain.
"Nor do you," says Brand.
Watch the rest of the 10-minute interview below: