But then, the winners write the history; the losers live it.
You are giving short shrift to the support and alliance that many Jews made with the Muslims. Take a look at the history of Spain and the history of Jews as administrators for the Muslims over the Christian population.
You obviously did not read the entire article with an open. mind. The plight of the Jews was mentioned, and explained as a renegade group that was out of control, much like some members of the US Army have been out of control during the Iraq War.
The Crusades were a reactionary movement to preseve Christian Europe from the advancement of Islam. It was primarily defensive in nature.