I agree completely with the latter part of your post. Ukraine is not a vital US interest, nor are we obligated by NATO treaty to defend them. The sanctions against Russia are indeed problematic and a mistake. But don't forget, Russia and Ukraine were wrangling all through the Trump presidency. Look at what Russia did to Ukraine while Obama was in office, and look at what they've done while Biden is in office, and compare that to the little or nothing they did militarily during Trump's tenure. Just coincidence? I think not. Trump knew how to influence other world leaders; he was respected as a strong leader on the world stage, one who (the others felt) would not hesitate to use military force, yet he did it mostly through a combination of posturing, tough talk, diplomacy, and exemplary quick action (such as the takeout of an Iranian military leader who'd ordered lethal actions against US citizens in Iraq). Trump maintained peace by projecting an image of strength and decisiveness, with just enough wild unpredictability, to keep Kim and others in check. Under Biden, Kim and Putin and Xi are running the chessboard while Biden sluggishly reacts & overreacts. (Calling the leader of a major nuclear power a "war criminal" and a monster who cannot be allowed to remain in office? And when the WH walked his reckless, diplomacy-wrecking rhetoric back, Biden refuted them and said he wasn't taking any of it back. The arrogant idiot!) The specter of WWIII never loomed so near as it does under Biden's feckless "leadership."