On the day Russian opposition leader Alexei Navalny was buried in Moscow’s Borisovskoye cemetery in early March, only about 90 of his supporters were detained across the country. Given the scale of the previous crackdown on his followers and the total number of people who had come to pay tribute to the Kremlin’s most vocal critic, the number seemed surprisingly small. The queue at Navalny’s funeral stretched for hundreds of yards. The pile of flowers almost entirely obscured the wooden cross at his grave. The explanation for the police’s initial hands-off approach, however, soon became apparen…