Maybe it was Islamic extremists who killed Boris Nemtsov. Or someone offended by his love life. Or agents of a Western power that will stop at nothing to disfigure President Vladimir Putin’s image and drive him from power. Russian investigators, politicians and political commentators on state television on Saturday covered much ground in looking for the reason Nemtsov was gunned down in the heart of Moscow, but they sidestepped one possibility — that he was murdered for his relentless […]