Ukraine's plight in the 1930's under a no longer existent USSR does not give Kiev a blank cheque to oppress its Russian-speaking citizens nor to associate itself with NATO in their attempts to destabilize Russia.
So Israel can go "Soviet Israel" and genocide Palestinians, steal their land and then their government changes to democracy and keep the land. Those were not crimes of Israelis, they were crimes of Soviets. Ok to keep the land and oppress the Palestinians.
I am speaking of ethics and morality and you are speaking about legalese nonsense.
The ethnic Russian in Ukraine are mainly settler colonists from dozens to hundreds of years ago. Especially in Crimea, those are 100% settler colonist genociders.
Literally the entire Doge meme army of Ukrainian supporters support the entire break up of the Russian Federation. So yes, humanity support freedom over oppression. Nation states would fear Russia if they support the entire break up of the Russian Federation. Or supported the liberation of the North Caucasus. I am happy the good are starting with the liberation of Ukraine.
First liberate the Crimean Tatars and Ukrainians. That is the war objective.
No nation in Europe would risk nuclear retaliation or occupation from Russia in trying to liberate the North Caucasus. Nonetheless, it is a high moral obligation to support the freedom of the people of the North Caucasus.
Supporting genocidal Russians is worse than Bush wars and Obama civil wars. This is clearly obvious to ethical standards. Unless you are saying warfare = genocide and condemn your ancestors that waged war. Humanity has waged wars for thousands of years. Genocide is off the charts. The total combined non-genocidal wars do not compare with one genocide. Seriously. Are you Iranians brain dead.
Russian Empire was genocidal
USSR was genocidal
Russian Federation is genocidal
Russians are genocidal evil orcs.