I want to say, for the record, I think people like Jeff do an enormous service to the whole community of dialogue. It was at his invitation that the first Argument from Reason paper appeared on Internet Infidels.
The question that I am concerned with is whether there is a place for an open forum of debate and dialogue between believers and unbelievers. Some people engage discussion in ways that has a tendency to shut down discussion and polarize believers and nonbelievers. In the spirit of I Pet 3:15, and in the spirit of Lewis's founding of the Oxford Socratic Club, I think it wrong for believers or unbelievers to shut down discussion.
He takes as lot of abuse from more militant types taking the position he takes, and has dealt with it with far more grace than I would have.