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Deshchitsa arrived at the scene of the heated protest - which involved overturning cars belonging to embassy staff, the desecration of a Russian flag and pelting the building with firecrackers and paint - in an apparent attempt to defuse the crowd.
He confronted some of the protesters - or rather sided with them. Footage of the encounter shows the minister saying he is all for the protest and its goals.
"I would stand up here with you can say, Russia, get out of Ukraine," he said. "Putin's a f**ker, right!"
This treasure of Kiev-style diplomatic language was met with a joyous cheer among the crowd, which erupted in a concerted chant. The profane phrase comes from a chant of Ukrainian radical football fans and is very popular among anti-Russian-minded Ukrainians at the moment.
The minister looks a bit astounded by the overwhelmingly welcoming response and even sings a bit along with the protesters.
The Ukrainian government did not immediately comment on the spectacular work Deshchitsa demonstrated in building diplomatic bridges between Kiev and Moscow in front of the Russian embassy.
No comments followed from the Russian Foreign Ministry, which will probably not be able to find a proper response to such language in its guidebooks.
Cursing at Russian President Vladimir Putin however is not unheard of from the Ukrainian politicians. Oleg Lyashko, a Ukrainian MP who scored the third-best result in last month's presidential election, chanted the same profane song at a rally amid the election campaign.
at least one rider of apocalypse is already in Ukraine, the rest are approaching unable to resist a call from Ukrainians.