Justify? We’re any wars justified?
All those 10,000 wars in history with millions of people killed were justified?
There is no world court where you can sue for justification.
Use your head, and do not antagonize a more powerful neighbor if you want to survive. Follow that simple rule and you have better chance to avoid wars.
Fallacy of Moral Nihilism!
You are attempting to establish a Moral Equivalency between the Russian Invasion of Ukraine and all other wars (which you lump together in a single category, as though, e.g., America reacting to the Bombing of Pearl Harbor were comparable to Nazi Germany invading Poland).
Perhaps a more-apt description would be the "Appeal to Hopelessness" Fallacy. "All wars are bad... There have always been wars... Therefore the Russian Invasion of Ukraine is no worse than any other military action ever taken!"
Absurd!
Then you pivot 180° and invoke an Appeal to Pragmatism:
Use your head, and do not antagonize a more powerful neighbor if you want to survive. Follow that simple rule and you have better chance to avoid wars.
"That's right! Just bow down to the Nazis! Feed all of your friends to the crocodiles, and maybe they'll eat you last!"
Pure defeatism!
Regards,