This may come as a surprise to some who apparently never took, or slept through civics, but as it so happens, the U.S. Federal Government has absolute, uncontested, and final say in terms of things like foreign policy. You do not get to be selective on that front.
State level anti-BDS laws are worth as much as toilet paper, but if the President has negotiated our support behind an ally, I am not aware of anything that allows you to independently pull back that support as a private citizen.
If this is going to turn into the landmark case, that's cool; but there it is very cut and dry who gets final on things like this. And again, these are very perilous waters to test, as a finding of aiding and abetting a foreign adversary of the United States is literally the only circumstance where the label treason is applicable.
Mr. Musk, you are not the diplomatic arm of the United States. Usurp at your own peril.