"Can the Bush team mend fences with Iran?" - Did the Bush team take the American emabassy in Tehran by force and hold American citizens hostage? When are we going to make peace with Iran who did all of the above and does not think they did anything wrong? Never! At least as long as the mullahs plan to kill instead of practicing their religon in peace.
In addition, it's not the Sunnis that are coming out of Iran: it is a majority Shia population.
The guys coming in from Iran are a "little" better trained than your average pissed-off Muslim.