Its so strange that you can understand most basic Russia material reasons for supporting Cuba yet you somehow think the Cubans shouldn’t trust in those reasons. Also what in the world is your definiton of collaborator if it somehow doesn’t include things like being in BRICS? Im curious to see if it actually means something and is not just and excuse to avoid calling every AES state fascist for thinking Russia is a reliable friend.
The soviets got what they could from the Germans before the war started, and got as much industrial support as they could from western powers to set up their own manufacturing and industrial base and I view this in and BRICS in similar terms. Calling the Soviet Union under Stalin “Fascist collaborators” would be ridiculous, but arguing that the nazis were not fascists would be equally ridiculous.
Although I don’t find Russia to be quite as virulent as the nazis, the point of “Get what you can and ditch the fascists as soon as you can” to be about the same, and I wish they found another way.