re: So Ukraine is threatening the US at this point to get aid

We became their "ally" in this instance as we guaranteed to help protect their sovereignty in exchange for giving up their nukes.

After the Wall fell and the Soviet Union dissolved, my hope was that the US would have at least a reduced role in NATO, if not withdraw, so that the Europeans could handle their own affairs at their own expense.

Unfortunately, the USG thought otherwise.

But despite your hatred for Zelensky, he has a point - "you promised to help and you are doing half-measures".....