Well, a little perspective as I see it. If you offend a Jew in the Middle-East, he may offend you in return, but if you offend a muslim in the Middle-East, he very well may kill you. Seems a difference worth noting.
Oh there is lots that could be said, such as why even mention that "christians" killed Jews. Does Israel need support from the US? Going to strike Iran any time soon? Need some support from Christians in America?
Here's a troubling thought. If this guy gets this upset and reacts this way to it, what in the world is he doing on the government? With everything the Jews have to deal with over there, they need people in their government that are better than this man!
But you know, he'll get over it and for most of us, there isn't anything to get over.