When Hamas murdered 1,200 people on October 7, I was in eastern Ukraine, researching a long piece for the Telegraph on how the summer’s counter-offensive had gone. The death toll in Israel’s 9/11 was equivalent to just a week or two’s heavy fighting in the Donbas. Yet immediately it was clear that the massacre 3,000 miles away would mark a new phase in Ukraine’s conflict: no longer would it be the sole international crisis in western leaders’ in-trays.