“If Russia were truly done with Communism and are now “Capitalists”, why would they still support Marxist dictatorships.....”
Because it costs them little and inconveniences the West. There’s also a lot of Soviet nostalgia among the Russian leadership.
You might also ask why Russia gives aid & comfort to the various Muslim entities in the Middle East & Central Asia, especially when it has a huge Muslim problem within its own borders. Answer - “the enemy of my enemy is my friend”.
There’s an excellent article at www.spectator.org about the never-ending political need for Moscow to blame external foes for Russia’s problems.
As for this article, the fact remains that there are to this day far more Marxists in the faculty lounges of American universities than there ever were in the now defunct Soviet Union.
I’ve read that for communism to actually work (for better or for worse), it would have to be global in nature. And America has been THE obstacle to that dream ever being fulfilled. But what IF the obamunists DID ultimately succeed in transforming the US into a Marxist nation? The hibernating Russian Bear and the Red Chinese would seize upon that opportunity in a heartbeat. All three now/again Communist superpowers would join together and wipe out any nation that resisted them, and they would have the global communist domination they’ve sought for nearly 100 years.