Is Israel a threat to world peace? German writer Günter Grass has been blasted as an anti-Semite this week for making just such a claim in a new poem. But while the verse may not win any awards, Grass has kicked off an important -- and long overdue -- debate. And, he's right.

A great poem it is not. Nor is it a brilliant political analysis. But the brief lines that Günter Grass has published under the title "What Must Be Said" will one day be seen as some of his most influential words. They mark a rupture.