Russia is becoming increasingly a Muslim country. Russia counts about 15 million people (in a total population of over 146 million, including two million in annexed Crimea) of Muslim background, or about 11 percent of its population. All are not fervent believers, and even fewer practice Islam routinely. Moscow has the largest Muslim community in Europe: about one million Muslim residents and up to 1.5 million Muslim migrant workers. Given demographic changes, Muslims will represent between one third (the most conservative estimate) and one half (the most generous estimate) of the Russian population by around 2050. Russia’s Muslims mostly belong...