He isn't a Christian. He rejects the difference.
It sure shows
Obama’s clear acceptance of a caricature of the Crusades is an excellent example of his behavior and statements that keep the belief that he is not an American alive.
The triumphalism that is often part of popular history can be quite annoying if you are not part of the group whose triumphs are being celebrated. Obama seems to go out of his way to denigrate the accomplishments of western civilization.
An odd postscript of the crusades that shows their general place in Europeon popular culture is that toward the end of the middle ages (~1500IIRC) There was a movement in Eastern Europe to start a Jewish crusade among the Jews of the pale of settlement. Fortunately for everyone, this did not seem to go much of anywhere, and aside from being a strange incident written in an old history book I am having trouble finding references. Book was written before 1940 and is likely still in my college Hillel house.