I highly recommend taking the time to go to the following website and either download and watch the .wmv or listen to the .mp3 file.
Robert Spencer speaking at the Heritage Foundation on his book tour for his book "The Truth about Mohammed". It is extremely enlightening.
http://origin.heritage.org/events/20...about-muhammad
http://thf_media.s3.amazonaws.com/20...t-Muhammad.wmv
http://thf_media.s3.amazonaws.com/20...t-Muhammad.mp3