> Alliances with the USA aren't reliable

Can you please provide insight into this? As far as I can tell the U.S. has never failed to honor a treaty obligation, so the idea that it would suddenly abandon all commitments lacks historical precedent.

Ukraine is not now nor has ever been an ally To America. The Budapest Memorandum was not a defense treaty. It didn’t commit the U.S. to military intervention, it only committed the U.S. to respect Ukraine’s sovereignty and take diplomatic action if it was threatened. We have done that with sanctions and aid.

It doesn't obligate us to do that into perpetuity nor does it keep us from being compensated for that aid. For perspective the price Britain paid for its survival in WW2 was its empire.