AP Photo

FOR years Tatarstan was held up as a model of stability and tranquillity as the Muslim-majority republics of the Russian north Caucasus became embroiled in a separatist conflict that spawned a still-continuing civil war along religious lines. More than half of Tatarstan’s 4m people are Sunni Muslims who have long enjoyed friendly relations with the rest of Russia. Kazan, the regional capital on the Volga river 450 miles (724km) east of Moscow, is a prosperous and attractive city.