I've respected Col. Lang for a long time. He blogs regularly at Sic Semper Tyrannis 2007. He is a member of the papal order of the Holy Sepulcher, a graduate of the US Army War College, and was Defense Intelligence Officer for the Middle East. I've linked to his blog before on the importance of understanding Arab viewpoints and on what went wrong in the intelligence community before the war in Iraq.
On Feb 7th he gave a lecture at St. Mary's University in San Antonio on Islam, in its various forms. He gives several analogies and points out differences from the way Christians understand religion. To get his lecture, go here , click on the link and take the time to watch the lecture. It will add perspective.

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