It's even better - by invading Ukraine to steal their territory and mineral wealth Russia is quite literally behaving as an Imperialist nation, something confirmed by their own Propaganda which talks of Ukraine as something "which was always part of Russia" as well as by their interference in the internal affairs of other ex-Soviet Union nations such as Georgia.

Imperialism isn't limited to only conquering far away lands, even if that has been the most common form of it in Europe and for the US, and the Soviet Union itself can be considered an Empire, having been formed by Russia conquering other countries whilst maintaining control over several vassal nations.

Communism is just as Imperialist as the rest - it's only the style of Propaganda justifying the conquest of other countries that differs - which explains why it's so easy for the "Communists" who are mere parrots of the Soviet or Maoist propaganda (rather than independent thinkers) to side with Russia's Imperialism.