The Chi Coms did not in fire on Hong Kong even through it was owned by the UK.
At various times both the UK and the US did military build ups yet their bases were not fired on.
So your contention that "the North was the aggressor" does not hold water.
Of course the secession did not make any sense either.
And I never bought the "states rights" angle seeing as it was the South that repeatedly tried to impose it's will on the free states by demanding that they enforce slavery laws on free states land.
Your post is pure blather.
If Castro thought he had the ability to capture Guantanamo he would have done it yesterday.
Of course there is really no comparison with Fort Sumter. None at all.
Hong Kong is an odd situation. For the last few years at least there was no point in taking it. It would be theirs anyway in a short time.