Stranded passengers chanted protests at Europe’s busiest airport in Istanbul on Tuesday and soldiers dug out snowed-in drivers in Athens as a rare blizzard stirred up anger and chaos across swathes of the eastern Mediterranean. Istanbul officials ordered all private vehicles off the slushy streets and Athenians abandoned their cars in drifting snow as basic services such as food delivery in both cities ground to a halt. The problems were compounded in Athens and across some of Greece’s scenic islands by power cuts in the unusual winter freeze. “Athens is not used to this amount of snow,” 50-ye…