I don't have any strong objections to the idea of extending the US "nuclear umbrella" to protect Israel in case of an Iranian nuclear attack, but Charles Krauthammer is aware that Israel already has its own nuclear arsenal, right? I assume that an Israeli threat of a nuclear second strike is going to be a good deal more credible than anything a third party could offer. This is, after all, presumably why Israel went through the trouble of building the nukes.
Save your eyes. Take breaks.