I hate to mar such a beautiful thread with serious discussion but I can see that you need help and I can't ignore that.
First off, the so called "Nordic Model" or Social Democracy has no connection with communism. It's not merely some less extreme position on the same spectrum. Anymore than a dog is a less extreme version of a cat. Completely different evolutionary branch. Communism means state ownership of industry. The Scandinavian countries don't have that except in some mild non-relevant forms like Norwegian government having some stake in their national oil company. Sweden used to be socialist back in the 70s and their economy was dreadful and people rose up and cut back the government's role in industry massively. What Social Democracies like Sweden et al. are, are capitalist systems with high taxes to fund social programs. And you can make supportable arguments for that. I may or may not agree with it but you can make supportable arguments. It is not nor is related to communism which is the state owns industry.
Communism is mob rule with clothes on.
Sorry - gommunism.
We already produce enough food to feed everyone, we already have enough land for everyone to live on. If your position is that communism can't work because we just haven't reached the level of technology to make it viable then why isn't that true for every other system? And more to the point, which would you rather pursue? An economic and political model that works in difficult situations or a model that works only in an environment of such plenty that no economic or political model is needed?
If this post is a little tetchy, have the self-awareness to realise that you're basically accusing people who don't agree with communism (with plenty of historical evidence for their position) of not actually caring.
Personal anecdote: When I was younger I was aware that a lot of people became more right wing and more "selfish" as they got older. I committed to myself that I would not let my own morals waste away with age and that I would continue to push for my values and a better world. What caught me off-guard was not that my values changed, but that what I thought actually worked changed. My political and economic views have not moved rightwards because I have become less moral (I hope), but because I now see this as a more effective way to help people. That's what a lot of people on the Left and Communist supporters miss - they think someone is Rightwing because they don't care. It escapes them that the person might simply have a different view on how to achieve things.
Your mistaking Social Democracies as some kind of lesser version of Communism when they're qualitatively different, is evidence that you don't understand what communism actually is.