Apoligize to Iraq?

Saw a silly protest sign with apologize to Iraq, bring our troops home scrawled on it. So, what is a proper apology?

The Iraqis want 140 M-1 Abrams tanks, army bases made by the Corps of Engineers, and are paying us top dollar for those services. They need us to stick around with our fighter jets and drones until they can get their own. The one thing they don't need is us leaving completely and quickly. The surge troops are home or coming home, more draw downs are expected, and the Iraqis are modernizing their army.

The best apology for the mess is not getting out of Iraq, but helping Iraq take control of itself, like its currently doing. With billions in oil revenue, more production than before the war, and improved infrastructure, I kinda think we already apologized. But a free-trade deal might be nice, a permanent military alliance couldn't hurt, and a promise to smash Iran if it attacks them would seal the deal. Oh, except I doubt that's what the dippy protester had in mind.