Disaster doesn't always bring out the best in us. Sometimes, tragically, it brings out the worst. A case in point: the finger-pointing in the wake of the September 11 terror attacks, seeking to blame the atrocities on America's supposedly misguided support for Israel — and on Jewish Americans who supposedly manipulate the system to tilt our policy the wrong way. No, it's not a national groundswell. You hear it mainly on the margins, and if past experience is a guide, it will stay there. Still, the variety and persistence of the finger-pointers is startling: left-wing professors in California, right-wing fanatics ...