...Putin is probably not playing a violin but may be celebrating his recent electoral victory. One has to wonder if the apparent terrorist attack today, on a concert venue killing 40, wounding up to 100 (as per reports so far) and starting a massive fire, was due to Putin having won reelection. Then again it could have been due to the war with Ukraine, citizen unrest, an outright revolution commencing or whatever. Who knows! My guess though is it will be revealed sooner or later that the attackers were Muslims from one country or another, they have a history of such mass killing attacks in Moscow. More info at the sources: source 1 & source 2.
All the best,
Glenn B