Krauthammer And "[N]ever Again"

Krauthammer has a piece about the return of anti-Semitism and the cheap grace of Auschwitz memorials if we're not going to do anything about a nuclear Iran.

On the 70th anniversary of Auschwitz, mourning dead Jews is easy. And, forgive me, cheap. Want to truly honor the dead? Show solidarity with the living — Israel and its 6 million Jews. Make “never again” more than an empty phrase. It took Nazi Germany seven years to kill 6 million Jews. It would take a nuclear Iran one day.
Emotionally I agree with him, but what is his proposed solution? For years Conservative critics have been dunning the President's approach (I can't tell whether it's a strategy or just the random actions of a person who has no idea what to do) as appeasement, but what is the alternative? Is there anyone who doesn't think a nuclear Iran is inevitable short of a show of force? I don't see evidence that either talking or not-talking makes the slightest bit of difference to the mullahs.