I can't really imagine the amount of effort you have to put into keeping HN on track. I thank you for that as well.
I do however want to mention that the US cultural context is not always that apparent for a non-American (such as myself). My comments were made taking into account strictly the GP and your comment, not any pre-existing cultural context. Back where I'm from (broadly speaking the EU) simply mentioning that Cuba is socialist or that the embargo is anti-communist doesn't come across as particularly controversial or flame-bating.
I wrote about that here if you (or anyone) are interested: https://news.ycombinator.com/item?id=23308098
I can say that in my case confronting people with wildly different political opinions has pushed me to become more dispassionate/detached in my replies, as well as to focus on the substance of the argument. I have started taking things more literally (which is probably what lead to our present conversation) and providing more precise and detailed rebuttals.
All of this I consider to be intellectual progress on my part, so to me HN has provided challenging and fruitful waters to swim in. For that, again, I am grateful :)
The problem with your logical inference is that you're applying binary logic and human interactions are profoundly non-binary.