Juan Cole walks through a series of reasons why the protesters are right: we must get out of Iraq. But he gives us the real reason -- and this is the first time I've heard it (if not the first time I've thought it):
The first reason to get the ground troops out now is that they are being fatally brutalized by their own treatment of Iraqi prisoners. Abu Ghraib was horrific, and we who are not in Congress or the Department of Defense have still only seen a fraction of the photographs of it that exist. Sy Hersh learned of rapes, some of them documented. Human Rights Watch has documented further prisoner abuse by US troops in Iraq. Sometimes the troops just go in and break arms or legs out of frustration. It has long been obvious that the Abu Ghraib scandal was only the tip of the iceberg, and that the abusive practices were allowed and encouraged by Rumsfeld and high officers, and weren't some aberration among a few corporals. (Even Senator Frist may be involved in a cover-up of the torture.) There is also no reason to think that the abuses have ceased. The denials of the US military, based on its own internal investigations (which apparently involve looking at official reports filed and talking to officers in charge) are pretty pitiful. The brutalization of the US military and of its prisoners is a brutalization of the entire American public. It is an undermining of the foundational values of the Republic. We cannot remain Americans and continue to behave this way routinely.
You don't commit brutal acts without becoming brutal yourself -- and creating a society which is violent and brutal. That's why I'm against capital punishment. That's why I'm against the misuse of the military for anything other than strictly defensive purposes on our own ground -- and that only sparingly.