The maxim that wars are easy to start and hard to end does not appear to be troubling Benjamin Netanyahu. For the Israeli prime minister, conflict is an end as much as a means, extending his political survival. Under international pressure – however belated and insufficient – over the slaughter in Gaza, he launched the attack on Iran. Initially presented as essential to prevent Tehran from the imminent acquisition of a nuclear bomb, a claim running counter to US intelligence, it is increasingly discussed as the path to bringing down the regime. The defence minister, Israel Katz, has said that Iran’s supreme leader, Ayatollah Ali Khamenei, “can no longer be allowed to exist”.

Donald Trump has generally seen armed conflict as a trap rather than an escape route. He said that the US would “measure our success not only by the battles we win but also by the wars that we end – and perhaps most importantly, the wars we never get into”. Yet his failure to achieve the Nobel-worthy peace deals he wants, and Mr Netanyahu’s manoeuvring, appear to have made him keener on US intervention. Israel wants US bunker-busters to attack the underground nuclear facility at........

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