I don’t believe analyzing the world through an idealist framing of “good” vs. “evil” is particularly effective. Russia’s entry into the Ukrainian Civil War was prompted by NATO repeatedly violating Russia’s sovereignty, as well as Kiev committing ethnic repressions against the separatists in the Donbass region, which circles back to the Euromaidan coup backed by the west, which circles back to imperialism as a material system during the era of monopoly finance capital. The US-led imperialist order is what caused the invasion in the first place, and ending this is what’s most important for the entire working class.