If Israel were to attack Iran in the face of explicit US non-support and if Iran used its only feasible defensive weapons – anti-ship missiles – against US shipping in the Persian Gulf, there would most certainly be a significant loss of US servicemen’s lives. The “post-mortems” would unquestionably blame Israel for the loss of those lives and the “special relationship” would be severely damaged – IMO, this is why Israel would not attack without explicit US support. An increase in US anti-Semitism would follow if it was perceived that US lives were lost for only the pursuit of Israeli hegemony

However (again IMHO), if the attack directly involved the US military or there was explicit support for an Israeli attack, the US MSM would rally behind the US military and concentrate on the demonization of Iran rather than explore that most taboo of subjects – AIPAC’s influence on US foreign policy. Without that scrutiny US Jews need not have a worry of increased anti-Semitism.