No war can truly be holy if it pursues holy ends by unholy means. Even if you believe a violent war is justified, it is always a compromise with evil. If we must have soldiers, as Reinhold Niebuhr once said, we should have sad soldiers. But a non-violent struggle against poverty, against pollution, against climate change, against drugs, against war itself, against racism, against evil in any of its many forms – that might truly be a holy war worth fighting!