It’s also just prudence when it comes to the allegiance. If America is going to let a much smaller, less powerful ally get invaded and their idea of a “deal” to end the conflict is to cut off all aid to the ally and give the invaders everything they want, then the allegiance amounts to toilet paper. There’s no sense breaking your back to maintain a relationship with an ally who is going to give you nothing but dishonor and cowardice in your time of need.
It’s also just prudence when it comes to the allegiance. If America is going to let a much smaller, less powerful ally get invaded and their idea of a “deal” to end the conflict is to cut off all aid to the ally and give the invaders everything they want, then the allegiance amounts to toilet paper. There’s no sense breaking your back to maintain a relationship with an ally who is going to give you nothing but dishonor and cowardice in your time of need.