For U.S. occupying forces to close Iraq's borders at Hajj time would be like the Israeli Defense Force closing down Bethlehem at Christmas. Oops. They already did that -- and discovered it was a bad idea. Now the IDF has just limited itself to imprisoning Bethlehem with checkpoints and the Wall. But even despite this, going to Bethlehem is always a good idea -- it is the experience of a lifetime for Christians, just like going on Hajj to Mecca is the experience of a lifetime for Muslims.
By the way, going to Bethlehem is absolutely safe. Palestinians -- both Muslim and Christian -- are the soul of hospitality. And they have internet cafes there too so you won't feel lonely. Stay at the Bethlehem Star Hotel. You'll feel right at home. But I digress.
I recommend that every single Muslim in Iraq go on Hajj this year. Just stop killing each other and do it! Even the Kurds. The oil will still be there when you get back.
PS: If one wants to keep people happy and peaceful, just keep them busy! Jobs, schools, arts and crafts? Whatever it takes to keep their minds off making bombs. Installing electricity in Baghdad would be a great first step!