The simmering war in the Middle East fractured Europe on Monday, as allies clashed, tempers flared and the shock waves from the US and Israeli bombing of Iran threatened to reverberate through the continent. The crisis exposed a familiar European fault line: while leaders insist they are the last guardians of the rules-based international order, they remain split over how to respond when allies bend or break those rules. With oil price spikes threatening to compound the European economic...