Because UA never had a formal alliance with the US. Only some words written on toilet paper in exchange for giving up their nuclear weapons. And then we let ru gobble up Crimea and just sat on our hands and did business with the monsters, DE the most.
We finally are seeing the moral reality since the full scale invasion of the 2014 war initiation by ru (aka UA antiterrorist operation) when ru planted their little green men into a foreign country, blew up Malaysia Airlines Flight 17, and instigated a takeover of parts of UA.