Europe

That's not so much done for diversification but geography and economics.

Poland has regions where -just like in Ukraine- the average Western tank is at times to heavy to operate properly. The K2 is more than 10 tons lighter and Poland scrapped several original requirements to keep it that light because that's the whole point. Also the K2PL variant additionally comes with (partly) modular composite armor.

And Poland wants domestic production (and the neccessary tech transfer to facilitate it). Something that South Korea is allowing for better footing in the wider European market.

That doesn't make the decision for US Abrams as the main tank better.

As far as I understand it, this is a (social) media exaggeration. But a lot of the F-35's capabilities, in particular the stealth and networking that are the main selling point, depend on constant adaptions and updates of the electronic systems.

Sure, we can talk about conspiracy theories of a possible killswitch backdoor hidden in the code. But that wouldn't even be F-35 specific. The more interesting aspect is logistics/spares and software updates for that very high-maintenance jet with modern electronics.

already have all the rules in place.

Greenland is an EU overseas territory. There is no EU Article 42 defence. Denmark can still ask within Nato rules.

I'm Danish, and I'd like to believe that the rest of EU would at least impose harsh sanctions, but I'm beginning to worry that there won't even be a strongly worded social media post.

There are and have always been bizarre political currents in europe (like the extreme left, and the revolutionary left bombing stuff in the eighties just as an axample), but it's not like the USA where everything catches fire at once, we're 27+ countries and they all pull in different ways, so far right expansion is something not to take lightly, but it will not be a walk in the park subverting the EU (fascists tend to need a sort of quick power grab) even if it can happen in distinct countries.

I also believe the Kremlin is behind lots of those problems, amplifying them and sponsoring far right parties. And it seems those days will come to an end or at least be correctly countered and not welcomed with open arms like in the last 20-30+ years.

So I'm quite optimistic for the long haul, we got some 5-10 turbulent years ahead but I'm confident we'll survive mostly.

Depends on where you draw the line of "sovereign". You can't really have, for example, an independent military in any reasonable way if you're, idk, Belgium. But there is a sliding scale. The US, for example, is in theory just a highly integrated collection of loose states.

I disagree. We need a united front against the US and other powers. Especially our outwards responses are mired in long discussions where every country needs to have a say. We need a federal or super-national entity that decides upon these things without requiring every grain of sand to have input.

If we remain sovereign states, we will never see ourselves as "Europeans" but "French", "German", "Slovakian", etc. We don't have a "European" passport and it shows. There is no European identity just a mashup of multiple countries that think about themselves first and Europe second.