I thought the current Commonweal editorial an excellent one, worth highlighting here and elsewhere. For a taste:

Many bad arguments have been advanced for the war in Iraq, and the president has used almost all of them over the past five years. He has variously claimed that Iraq posed an imminent military threat, was involved in 9/11, demanded humanitarian intervention, or that it offered a rare opportunity to establish democracy in the Middle East. Yet surely the worst, and perhaps the most offensive, argument for launching such a preventive war is the claim that every human being bears the image of our maker. Christians and non-Christians alike should tell President Bush to stop it-to stop using Christian language to justify his decision to go to war. The last people to applaud such sentiments ought to be religious broadcasters.