Can't help but wonder how a modern day Operation Fortitude would look like. Some fake leaks on the Warthunder forums, a few tweets and shitty photos by totaly legit soldiers, some fake AMA on /pol/ which conveniently gets deleted by the jannies and once the broocsfags and other usual suspects take notice it'll spread around like wildfire.
You are one dumb fuck. Disregarding their funding of leftists/islamic terrorism, Venezuela and Iran are also providers of oil for China and a key part of both those conflicts is rendering the Chinese more and more dependent on American controlled oil, helping secure US hegemony and further discouraging an invasion of Taiwan. Cuba is at most an entry vector into the US but can easily be taken care of and in time with some investment turned into a potential ally in the region.
Yes, you are correct those aren't threats on the scale of other powers but by getting them out of the picture you are weakening the ones you have a reason to be worried about. Russia now has to send Iran supplies rather than the other way around, China now has to decide between helping Russia and Iran while also being forced to buy American oil which ain't the most productive course for their Petroyuan ambition. There's this
obscure conflict you might wanna read up on.