You're mixing up cause and response, once again, and ignoring the timeline of events.
> There has been order-of-magnitude 100 billion dollars worth of NATO gear provided to Ukraine with the express purpose of killing as many Russians as possible, let alone the intangible value of various forms of aid provided (things like intelligence are hard to assess). "Hehe, well we didn't file the proper paperwork" isn't exactly the sort of response that is going to get a good result.
> I doubt the Russians are worried about whether the US followed its own self-imposed process of officially declaring the alliance. They're worried about the network of countries that the US is building up with the fairly plain purpose of destroying the Russian military followed by regime change. They respond to threats when they detect them, not when the US or whoever decide to officially declare that the threat is being made.
Many countries, just not NATO, have sent weapons and other resources to Ukraine for it to defend itself against the Russian invasion, and to deter further Russian incursions or invasions beyond Ukraine. They were not sending those quantities in advance of the war.
Had Russia not invaded Ukraine in February 2022 two things would be presently true: First, it would not have lost all that military personnel and military equipment, and, second, Ukraine would still not be in NATO. Once again, Western countries spent months trying to convince Russia not to invade, as they expected Russian forces to swiftly overwhelm Ukrainian forces and take over the country. It was only when Ukraine put up better than expected resistance and repelled the attempt to take over Kyiv that Western countries began supplying it in earnest.
> The presence of all those members is why I think it might well happen. NATO has the real estate and doesn't seem worried about escalations. Why not? NATO seems to be pretty firm in their belief that a good offence is the best defence; I think technically we've never seen them fighting defensively? Although I maintain de-facto that what seems to be happening in Ukraine is the defence of a NATO country.
Now you're just speculating. The actual history of NATO expansion, its actions, and the restrictions it has openly placed on forward deployment of forces have shown it to be very concerned about escalations and about Russia's fears.
> Can you name a war where the invader had a right to start it? This is war! The people purposefully starting wars are almost uniformly monsters clothed in human flesh. The best case is that they are monsters in an age of other monsters. If there are exceptions to that none spring to my mind.
Yes, the coalition attack on Iraq in 1991 to repel its forces from Kuwait is one example, but there are others. You should read up on jus ad bellum and how it applies.