Fashionable Western opinion might revolt against the idea, but we should not discount the possibility that Mr Netanyahu might have a point this time. If the West lifts sanctions and allows Iran’s leaders to fill their coffers with oil revenues, in return for graciously agreeing to defer their ambition to be a nuclear threshold state until somewhere between 2025 and 2030, then that would not be good enough. The whole point of this immense diplomatic effort was to remove the threat posed by a nuclear-armed Iran for the foreseeable future. Simply deferring that possibility by a decade or so – and then leaving the future leaders of the West to deal with the consequences – would be cowardly and unconscionable.