I think you better stick to politics. You understanding of today's Air to Air capabilities are how should is fundamentally limited and flawed Yes today's AWACS are highly capable command and control aircraft and provide the necessary data links to fighter aircraft to identify friendly aircraft (Mode 4, & 5 IFF). No fighter aircraft are not "guided by computer", pilots fly the aircraft with data information from AWACS(Air force) or Hawkeye(Navy). Your assumption about "visual" contact is totally flawed. No pilot is going to limit his air to air loadout to BVR missiles. At the closure rate of modern aircraft a BVR fight will quickly turn into a dogfight where the AIM-9 and even guns are used. Yes, today's fighters still carry 20mm M61 Vulcan cannon. Now if you are really interested try
F-15 vs F-16 Fighting Falcon - Difference and Comparison | Diffen now go to
F-16 vs. F-18 - A Navy Test Pilot's Perspective
You will also notice in the articles the idea of the air-air knife fight and the idea that this is a mandatory training. The US Air Force learned their lesson in Vietnam that the idea of "dog fights" are still an art that pilots have to learn.
Now the above is just in response to your misunderstanding of my original contention.and in addition to your misinformation about air-to-air combat. First my contention was in response to the subject of the OP. This was that Obama would thwart a attack by Israel against Iran. The only way anyone could thwart an attack is to go after Israel's aircraft. I hypothesized that not all US pilots could agree with their orders and not attack Israel aircraft by using the plausible excuse that they could not find the Israel aircraft and to extend the hypotheses that they (US pilots) possibly get engaged with an Iranian aircraft in self-defense.
Now I'm not saying this is possibly, but if one thinks that Obama would order US aircraft to attack Israel aircraft one could also make the equal ridiculous scenario that I put forth.