Utter and complete nonsense, given Russia's lack of hegemony even among its own neighbors.
The only place where Russian social imperialism should be a priority to fight is with the Russian Left themselves and only the Russian left, as they have already done so in demonstrations and acts of sabotage. Everywhere else, even in Ukraine, it is imperative to act against the dominant form of capitalism centered around the United States and its acolytes.
OAKKE are a joke party who are so disconnected from the working class and what is keeping them down from power that their nonsense was probably started as a psyop by Greek intelligence. Especially a joke as many of them were hunted down and tortured by the client regime of the military junta and the austerity package imposed on Greece by the American-capitalist system appendage; the EU.
They believe Putin (and Gorbachev?) were horrible imperialists, but Stalin wasn't?
Gorbachev worked to overthrow the legitimate governments of the Warsaw Pact and in favor of abolishing autonomy of the nations within the Russian SSR into something resembling the United States. Thing is, as he was a weak leader and most of the bourgeois leaders who took power were pro-US, the plan fell apart.
Calling Stalin an imperialist is like calling Lincoln an imperialist as he fought against the Confederacy, or when the US government sent a contingent to chase out the French from Mexico in favor of Benito Juarez, absolute nonsense.