[Varda]

Tell your son an opinion is only as good as the information it's founded upon. Ask him to read this short article and compare it to the professors statement.

The Real History of the Crusades written by Thomas F. Madden, Professor,Director, Center for Medieval and Renaissance Studies, Saint Louis University

[vladimir998]

Thomas Madden - who I had the pleasure of meeting several years ago - has a short book covering the history of the crusades in the same vein as that article. I highly recommend it:

http://www.slu.edu/departments/history/images/mcrus2.jpg

http://www.slu.edu/departments/history/madden.htm