Every Israeli red line seems to have turned pink, anyway. Every few months, the media is full of anonymous Israeli sources warning portentously about an imminent strike -- and so far, they have all proved to be false alarms. The more it threatens military action and doesn't produce, the less street cred Israel has in a region where it wants to be feared and respected. If the United States and Israel want to talk red lines, do it in private -- that's where they become real and serious.
Second, it makes no sense to air U.S.-Israeli differences publicly. It sends a signal to America's friends and enemies alike that the relationship is weak and dysfunctional. And the message it sends to Iran is particularly counterproductive: Don't worry.
Third, Netanyahu's remarks could be construed as an effort to intervene in American politics. Let's be clear: Israel and the United States have been intervening in one another's politics for years. And while I don't think the Israeli prime minister had that motivation this time, the timing of these remarks -- 50-odd days (and they will be odd) before the big dance -- will be seen by some as a transparent effort to embarrass and corner Obama, or to actually sway the views of American Jews. Obama bears his fair share of responsibility for screwing up the U.S.-Israeli relationship, but this perceived intervention by Bibi could do major damage. The last thing Israel needs is an angry second-term president who believes his Israeli counterpart played an active role in trying to defeat him. It's unseemly and counterproductive.
The Iranian nuclear issue is complicated enough without two close allies bickering in public about what to do about it. I must say -- having watched American presidents and Israeli premiers since Jimmy Carter and Menachem Begin -- that this has to be the most dysfunctional pair I've seen. Since both leaders may well be around for some time to come, let's hope they can find a better way to cooperate. The risks to American and Israeli interests will be too great if they don't.