I feel like what you're imagining is kind of like that joke from the recent Rick and Morty episode where Iron-Man Jerry goes to fight the Hitlers at the Hitler convention and ends up blowing up the entire planet and goes "damn I hope there wasn't anyone else on this planet" and it cuts to a news anchor going "...and there was no one else on the planet! Only Hitlers!"
But Ukraine is not a nation of 44 million Hitlers all planning their own holocaust. If it were you'd have a point, but there are many other Ukrainiens who have a right to their country.