So many seem to have just swallowed anything and everything the US propaganda has put out this year and know absolutely nothing about the last 10 years of Ukrainian history.
There are Russians in Ukraine and Russia is fighting for them. How is that irrational? You can argue they're wrong to do it, or that they shouldn't. But irrational? Nonsense.
Your links are highly disingenuous. Russia supported armed separatists and started a low-grade war against Ukraine in 2014. Their aims have always been clear: control Crimea and seize control of a land bridge to it. They never hid these intentions, and you'd have to purposefully ignore this realpolitik in order to lay the blame at Ukraine's feet.
Are Ukrainians all saints, souls pure as the driven snow? Clearly not. Certainly not significantly better (or worse) than Russians. Similar people, similar politics, similar ethics. Their country is just as corrupt, if not more so. Their politics is just as dirty. They have their right-wing white nationalists the same as Russia. They killed people in the Donbass for a decade, yes.
But who invaded in 2014? Russia.
Who invaded in 2022? Russia.
Your argument is a lot like saying that the police in Iran are killing women "for a reason".