Open this photo in gallery: Gershon Baskin, co-chair of the Israel Palestine Center for Research and Information (IPCRI), outside his office in Jerusalem with documents faxed to him by his Hamas interlocutor.Heidi Levine/The Globe and Mail For the first time in his long career as a peacemaker, Gershon Baskin agrees with the consensus in Israel that, when it comes to Hamas, there’s nothing left to negotiate. That was a hard conclusion to come to for Mr. Baskin, a 67-year-old paragon of the Israeli left – and one of the architects behind the scenes of the hopeful peace processes of the...