The safety of the Russian people depends upon President Putin’s response to the St Petersburg attack. If the President rounds up more Chechen activists or pounds what’s left of Syria’s cities, then he will only provoke another murderous attack on a train. Russia’s involvement in Syria’s war is one motive, the long-running conflict in Chechnya another. Whichever group may have been responsible, or whichever terror organisation inspired some lone individual, the response of Russia, many believe, is likely to be one of further repression and an appeal to nationalist sentiment. This has been the Putin way for as long as he has exercised power in his land. Pray that this event would not bring another twist to the cycle of violence in the region.