wThe removal of a Red Army statue in Prague was never likely to go unnoticed by Russia. The monument in question was to Soviet Marshal Ivan Konev, who led the 1945 liberation of the Czech capital from Nazi Germany. To many locals he was a reminder of communist-era repression, having helped crush Hungary’s uprising a decade later and then contributing to the construction of the Berlin Wall. But in the time of the coronavirus, with most of the world in lockdown, post-Cold War conspiracy theories are finding fertile ground, especially in places that were once in the Soviet sphere of...