Foreign policy is always about power, end of story.
America has been trying to remove itself from the ME, or at least significantly shrink it’s footprint, without leaving a power vacuum for Iran to fill. The plan was to have KSA and Israel fill that void instead, along with Turkey.
Morality and principles only directly impact foreign policy decisions if they impact the domestic political calculus. For example, if MBS believed moving forward with the Israeli partnership would result in him losing power.
This is not reflective of my own feelings or values. It’s just a neutral observation and assessment of the situation.