I think his ignorance about Islam is probably due to the following situation:
In a local bookstore was a very expensive, beautifully bound in green leather Holy Quran. If one was going to give a gift to someone, like a president, or any other high "ranking" person in society, it is what you would buy. Every page was in Arabic on the left side, and English on the right. The English side was just like the other modern ones, all the "bad" stuff left out.
I have a non Muslim friend who is fluent in spoken and read Arabic. I asked him to come to the bookstore with me, because I was too cheap to buy the book. I pointed out the sura I mentioned, and a few others, plus there were some he was familiar with he wanted to check. (he had spent quite a few years in Saudi-Arabia as a civilian).
I have never seen the expression that came on his face before. Absolute shock. He had only seen true versions before too. He said, "My God, they are two different books". I remember those exact words. I don't remember the rest of his comments word for word, but he went on to say, that this explains why so many people in our government have the wrong idea about Islam.
He used to sit on the Joint Chiefs of Staff, and had a good idea of what was thought about Islam in our government.
Enough guys go overseas though on tours etc, you’d think they would have it all figured out. Instead they still pull the wool over our eyes.