Don't even think it.
Most Iraqis are on our side, as shown by International Crisis Group sureptitious polling. As for Iran, I haven't heard of such polling, but the fact that protesters yell pro-American slogans should give an idea. Now Syria, I haven't read about lately, but does seem to be a country closed enough that its people do not understand the real story. However, it is the the regimes and their military which would be obliterated under these scenarios, not the metropolitan areas.