Recent history matters, and UKR has had their territorial sovereignty violated twice in the last decade by the same hostile invading force. That’s a fact. Im not missing all the history of UKR-RUS, and considering my job I’m probably more well-versed on their 30-year history and current ops than most anyone here, but none of that excuses Russia’s current actions.
WRT our policy, you’re right. We do not have a good track record nation building. The ME was a fvcking whack-a-mole debacle on a lot of levels, even if some of it was unavoidable. I argue this is different, though. We are supporting a sovereign nation (not trying to build one) against a long-term adversary of the west (not a bunch of radical shitheads). That particulars adversary is the second most prominent member of the SCO and has committed a host of belligerent acts against us and our allies. We are collecting a ton of info for a relatively (good argument to be had here) low cost. There are significant 2/3 order effects - want RUS to have a land bridge to Moldova? This is not AFG 2.0.