McCain wants Europe to address US failures in Afghanistan

Why do people like McCain think that other have to fill the troop gap in Afghanistan when it was the unilateral decision by the Bush administration to remove US forces, equipment, supplies from the real war on terror and shift it to Iraq? The US had no problem making this decision without debate so why all of the fuss now? The decision to go into Afghanistan was in the best of interest of the US and Europe, but let's be clear, the US had the most at stake and the most to lose by failure in Afghanistan and yet that is what was chosen by Bush and the GOP.

If people like McCain had done their job and asked questions a few years ago we might not be in this situation today. If John McCain was unable to do his job in the Senate, why does he think that he's uniquely qualified to do the job in the White House?