Invasion of Ukraine was going contrary to their interests, as we could see in countless maneuvers around that. Not accidentally west decided to play all the sanctions, there was very real possiblity of Russia really keeling over under them like it was intended. If you look at this war as imperialist war from the Russian point of view, it does not have any sense to do it, it only have sense if you see that Russia is reacting to prevent its own recolonisation.