U.S. has abandoned allies before
We’ve abandoned allies before. When we realized we were going to lose the Vietnam War we convinced many South Vietnamese to continue working with us. We gave most of those who were most closely aligned with us assurances we’d get them out of Vietnam if North Vietnam won.
At the very end our ambassador at the time wouldn’t implement the in-place plans to evacuate those Vietnamese c-workers because that would be admitting we were going to lose.
Remember those pictures of the helicopters leaving the US embassy roofs? We helped few get out and of those stuck there, many were tortured and killed by the North Vietnamese. It was morally and ethically despicable to abandon those Vietnamese. History repeats itself.