You become an anti-Semite. And as powerful as the Israeli lobby is, the Saudi lobby is just as powerful. In fact, the Saudis probably have more money to throw around, and they suborn former U. S. intelligence officials, former ambassadors, former generals to support them from within by lobbying the Congress and other American institutions.
All of us have theories about the world and about ourselves. We will go to great lengths to prove ourselves right because it keeps the world in our head coherent and understandable.