The morality of the pro-war left

Does the fact that US soldiers have engaged in torture in Iraq demand of those on the left who supported the war to re-evaluate their position?

Wasn’t the main reason given by those on the left who supported this war why they did so, the chance to remove a dictatorial regime, rather than any of the official reasons given by the Bush administration?

Than surely, the fact that the liberators themselve engage in torture and rape, must cause some soul searching? After all, what does liberation matter if torture still happens?