Mr. Blackwell and Mr. Morrison continue their commentary: "There are indeed certain precedents for Thou Shalt Not. Including Thou Shalt Not Murder. And an Iranian cleric who daily incites his captive people to slaughter the Israelis has violated that ancient Thou Shalt Not. That is why the Israelis now have their Casus Belli, their just cause for war. If they strike Iran's still-spinning centrifuges and stop their headlong quest for atomic weapons, they will be well justified. Americans should thank, not criticize, Israel if Israelis defend themselves. They'll be defending us, too. They may be fighting by themselves alone, but they do not fight for themselves alone."