> thoroughly-debunked copypasta. In the post-WWII international order where lines on the map are generally respected to avoid war: Russia attacked, and continues to attack, a sovereign country. Period.
None of that has been debunked, it's quite literally factual events and treaties not honored that all parties admit weren't honored. None of those facts are in dispute by anyone.
Regardless, if you want to dive into the post-WWII international order, the right of self-determination also wasn't honored. The west aided in a coup in 2014, removing the elected leadership of Ukraine. After that, the western half of Ukraine voted to leave Ukraine. Only after 6-8 years of fighting between the Ukrainian parties did Russia become involved directly and a new vote (where they again voted to join Russia) did they in fact join Russia.
As with everything in life, it depends on perspective. I'm personally an avid pacifist. Taking a life is never justified, even in self-defense. I personally see both "sides" as acting poorly here.
That said, I can look at both arguments and obviously see Russia is acting in self-interest. Ukraine is acting in their interest. But only one side here has been having their homes shelled for 8 years (the Donbass).