The victory at El Alamein, coupled with joint Allied landings in French Algiers, also finally spelled the elimination of an Axis presence in North Africa and ended the Italian dreams of a 'new Roman Empire'. There were also strategic implications: the defeat in North Africa began the series of events that led the invasion of mainland Italy and the toppling of the Italian dictator Mussolini. This brought the Italians onto the Allies' side and left Germany at a strategic disadvantage across the whole of the Mediterranean.
El Alamein was significant. It forced Hitler’s attention back to the west and began a process of serious attrition there which, combined with the relentless losses in Russia, was to lead to total defeat. Until then, his forces had been concentrated in the east, and were beginning to be stretched. With the loss of the desert, he had to divert forces to Africa. With the invasion of North Africa, he had to occupy Southern France, and found a Vichy French army suddenly becoming a Free French army and fighting against him. After they had cleared North Africa, the Allies invaded Sicily. On 25 July 1943 whilst fighting there was still going on, there was a coup d’etat in Rome, and Mussolini was imprisoned. The Allies then invaded the Italian mainland; on 29 September Italy surrendered to the Allies and on 13 October declared war on Germany. This meant that not only did German troops have to man the lines in Russia, Italy and the Balkans to replace the Italians who had been there, but they also had a new enemy. As a result of Alamein, what had begun as an imperial war developed into a main front with broad strategic and political consequences.”
You focus too narrowly!
This statement is damn funny: "wasted millions and tens of thousands of lives bombing civilians at night"
Have you never heard of Strategic bombing? One of the aims of war is to demoralise the enemy. You fumble around in the dark and comes up with conclusions without taking into account the broader perspective.