The information was not passed on because it was damaging to the military industrial complex interests at the time. Americans at that time in particular really felt infallible after the Cold War and did not accept feedback very well. The skunkworks/American military machine was starting to crack apart with laziness as things descending into contracting hell.
As I mentioned in my other comment, my perspective as an Israeli witnessing all this was, "Don't bite the hand that feeds you." It is a shame that Americans and others had to pay a price for arrogance and politics. It may not be the official story, but anyone exposed to that world could tell you otherwise.
They did however release a software patch within about 2 weeks of getting the report from Israel, but it took 10 days to make it to Saudi Arabia, one day late.
As I mentioned in my other comment, my perspective as an Israeli witnessing all this was, "Don't bite the hand that feeds you." It is a shame that Americans and others had to pay a price for arrogance and politics. It may not be the official story, but anyone exposed to that world could tell you otherwise.