Non of the targets were in fact military
mmm...but you have admitted that the targets had an industrial function. That places them on the list 'contributing to the German war effort' - therefore 'legal' in a war fought in 1943. The only reasons that dams and electric power production are on a no-strike list in 2013 are lack of political will caused by an ever-changing Western moral zeitgeist. If our backs are ever up against the wall in a future global war, would you really call the RAF Air Staff war criminals as they bomb the cr@p out of a dam/oil refinery/UNESCO site?? As I wrote earlier, illegality in war is very difficult to 'prove' as what world court is there to hear the charge and provide due process for the accused?
The targets of the area bombing campaigns were civilian population and logistical nodes and were a different target set to the dams. They were attacked for strategic reasons and Bomber Harris did get Churchill worried that he himself might face an international war-crimes court after the war...but hey ho we won!