Gideon Lichfield : When I discuss such questions with Israelis, as we peel off the layers of reasoning and approach the core, what I most often meet is a kind of crude Pavlovian determinism. The Palestinians, the Lebanese, the Arabs in general—they understand only the language of force. Not showing force is a mistake. Ehud Olmert, Israel's prime minister, summed up the thinking well this week in his speech to the Knesset: 'Our enemies misinterpreted our willingness to exercise restraint as a sign of weakness.'

Wrestling with the logic of force