Many observers have warned that Putin’s military campaign in Syria may backfire at home. Russia’s 144 million people include about 20 million Muslims; the overwhelming majority are Sunnis. Some analysts believe that these Russian Sunnis will recoil from Russia’s support for Assad’s Alawite-dominated regime and its attacks on Sunni rebels, and from Russia’s effort to lead a coalition of Shiite powers, Iran, Iraq and Syria. If pundits’ predictions were true, Muslims would be more likely to choose the anti-war response and less likely to support Putin’s intervention. But that’s not exactly what we found. ...There wasn’t a consensus among any...