Interesting followup notes from RT. Claims the whole thing was us and I'm inclined to believe him.

https://www.rt.com/russia/586268-dozens-arrested-dagestan-riot/

Ukraine was quick to claim that the incident was “proof” of Russian anti-Semitism. However, Russian Muslim leaders and senior officials have condemned the scenes as unacceptable, suggesting the unrest was incited from abroad.

According to Melikov, the riots were sparked by rumors initially spread through the Utro Dagestan (‘Dagestan Morning’) Telegram channel, which has been exposed as a Ukrainian intelligence service project designed to stir ethnic and religious unrest in Russia. The channel was founded by Ilya Ponomarev, a former Russian MP who fled to Kiev in 2014 after being charged with embezzlement. The channel was blocked by Telegram on Monday for inciting violence.

Russian President Vladimir Putin has stated that the anti-Semitic unrest was organized through social networks by Western intelligence services operating from Ukraine, and was part of a broader effort to destabilize the world.

“Cojones”