And moreover, both Ukraine and Russia are brothers, just in arms.
They were brothers until war started. War will end one day, but it's difficult to imagine friendly relationship between these nations in upcoming decades. I imagine that it will be something similar like Azerbaijan and Armenia now.
Russia is simply trying to survive hostile NATO policies.
So, poor little Russia is victim now?
To be fair, NATO was formed to secure peace in Europe, countering the threat posed at the time by the Soviet Union. Why would such pact continue not only to exist, but to evolve AND spread eastward to Russia's borders past the Soviet Union collapse? Can you comprehend why Russia doesn't like that?
Maybe because Russia is direct security threat for these Eastern European countries? Considering behaviour of Russia don't leave an option for them to stay neutral. BTW, when Russia started invasion in Ukraine, they were not even close from joining NATO. And now Finland become full member of NATO and Russia haven't started ''special operation'' against them. It probably indicates that invasion in Ukraine isn't about NATO expansion to the east at all.