Remember how a few days ago Putin thanked Trump for some anti-terrorist intel?
I bet in return Vlad gave the Donald information on Suleimani's itinerary, knowing the Trumpster would swallow the bait whole and shoot himself in the foot, if you don't mind me mixing my metaphors.
The Kremlin knows the mullahs are not dependable allies, and that at any moment the Quds force could be unleashed on the oppressors of the Chechins and other Russian Muslims. What better way to remove a potential threat AND watch the Americans trip over their dicks yet again?