PHIIP PULLELLA and LEFTERIS PAPADIMAS POPE Francis condemned the exploitation of migrants for political purposes on Sunday during a visit to the Greek island of Lesbos, branding the global indifference to their plight the "shipwreck of civilisation". Francis walked through the Mavrovouni camp, which holds about 2,300 people, stopping to greet dozens of refugees and giving a high five to a young African boy. He first visited the island, one of the main entry points for migrants, in 2016 and took 12 Syrian refugees back to Italy with him. He lamented that "little has changed" since then. The Mediterranean, where…