I grew up in the depths of the Cold War as well and the Soviets were clearly our enemies and had to be confronted. But the Ukraine? I have two military age sons and sorry they are not going to die for your war over that crap hole the Ukraine. It’s not a vital US security interest. For the defense of the USA-or a treaty obligation yes they would fight, but not another blundering Vietnam/Afghanistan bloodbath.
Again this is not WWII. Munich was a blunder but should have never come to that. If you want to talk WWII Hitler should have been confronted when he reoccupied the Rhineland. You can’t force every foreign policy situation into a WWII based solution in doing so you narrow your response options.