Putin even copy/pasted the same excuses Hitler used to invade Czechoslovakia.

I never realized that Czechoslovakia had a coup which banned opposition parties, leading to rebels to seize control of the Sudetenland who then requested aid from Germany in the ensuing civil war.

Otherwise your insinuation that this is no different from anyone else who was incorrect about their reasoning for war just ends up being empty garbage.

Hubris. “Everyone else in the past 80 years who said the things I’m saying now has been wrong, but I’m obviously correct, because This Time It’s Different.”

It should at the very least give you significant pause, especially considering that the people responsible for lying the public into Iraq and Afghanistan not only faced no consequences for it whatsoever, but, in many cases, are the exact same people drumming up support for Ukraine. Fool me once twice three times four times five times six times, shame on me.

“It’s not an existential threat”, do things need to become existential before you tend to them? What kind of brainlet argument is that?

Missing the point. The point is, since it’s not an existential threat, Americans aren’t going to remain invested in the long term. And the war could go on indefinitely. In the face of that kind of stalemate, it’s inevitable that Americans will lose interest and throw in the towel. So, we shouldn’t get involved in what could be another 20 year long commitment like Afghanistan if we’re not prepared to follow through, instead we should persue diplomatic solutions. The justification of the conflict is irrelevant, it’s better to not fight a justified conflict at all than to fight a justified conflict for a little bit and then give up after a bunch of people have died. Or to put it a different way, a war cannot be justified unless it’s possible to win.

Americans are losing interest in the defense of Ukraine because Russian propaganda is working its way through the smooth brains in the states.

Blah blah magic Russian propaganda. We have our own propaganda, there’s no reason to think Russian propaganda would be so much more effective than our own, it’s just a talking point and not a serious explanation.