He did so to the delight of those in his audience like Ingrid Mattson.

CENTERFORSECURITYPOLICY: Friend of Shariah

Dr. Ingrid Mattson joined the chat room via telephone from Connecticut and CNN.com provided a typist.

CNN: Ingrid Mattson: What is Islam?

One stood out: Ingrid Mattson, president of the Islamic Society of North America.

CENTERFORSECURITYPOLICY: The Democrats' 'soft' jihadist

Ingrid Mattson is director of the Macdonald Center for the Study of Islamic Studies and Christian-Muslim Relations at the Hartford Seminary in Connecticut .

CENTERFORSECURITYPOLICY: The Democrats' 'soft' jihadist

Dr Ingrid Mattson from Canada, president of the Islamic Society of North America, who also took part in the Vatican forum, explained that Christian minorities have existed in Muslim societies for centuries.

BBC: Reaching across the religious divide