Hitler’s war against Soviet Russia and perpetration of the Final Solution led straight to his destruction, Bevin Alexander argues, in How Hitler Could Have Won World War II:
Hitler’s strategy through mid-1940 was almost flawless. He isolated and absorbed state after state in Europe, gained the Soviet Union as a willing ally, destroyed France’s military power, threw the British off the Continent, and was left with only weak and vulnerable obstacles to an empire covering most of Europe, North Africa, and the Middle East. This empire not only would have been unassailable from the outside, but would have put him into the position, in time, to conquer the world.
This did not happen. Hitler’s paranoias overwhelmed his political sense. He abandoned the successful indirect strategy of attacking weakness, which he had followed up to the summer of 1940, and tried to grab Lebensraum directly and by main strength. He was unable to see that he could achieve these goals far more easily and with absolute certainty by indirection — by striking not what was strong but what was weak.
Even after Hitler invaded the Soviet Union in June 1941, he might have gained a partial victory if he had not possessed two more lethal defects — insistence on offensive solutions to military problems when his strength was inadequate, and attempting to keep all the territory he had seized when retreat would have preserved his forces. These failings led to disastrous offensives — Stalingrad, Tunisia, Kursk, the Bulge — and “no retreat” orders that destroyed huge portions of his army.
The way to victory was not through a frontal attack on the Soviet Union but an indirect approach through North Africa. This route was so obvious that all the British leaders saw it, as did a number of the German leaders, including Alfred Jodl, chief of operations of the armed forces; Erich Raeder, commander of the German Navy, and Erwin Rommel, destined to gain fame in North Africa as the Desert Fox.
After the destruction of France’s military power in 1940, Britain was left with only a single armored division to protect Egypt and the Suez Canal. Germany had twenty armored divisions, none being used. If the Axis — Germany and its ally Italy — had used only four of these divisions to seize the Suez Canal, the British Royal Navy would have been compelled to abandon the Mediterranean Sea, turning it into an Axis lake. French North Africa — Morocco, Algeria, and Tunisia — could have been occupied, and German forces could have seized Dakar in Senegal on the west coast of Africa, from which submarines and aircraft could have dominated the main South Atlantic sea routes.
With no hope of aid, Yugoslavia and Greece would have been forced to come to terms. Since Hitler gained the support of Hungary, Romania, and Bulgaria, Germany would have achieved control of all southeastern Europe without committing a single German soldier.
Once the Suez Canal was taken, the way would have been open to German armored columns to overrun Palestine, Transjordan, the Arabian peninsula, Syria, Iraq, and Iran. This would have given Germany unlimited supplies of the single commodity it needed most: oil.
As important as oil was for the conduct of modern war, the greatest advantages of German occupation of the Arab lands and Iran would have been to isolate Turkey, threaten British control of India, and place German tanks and guns within striking distance of Soviet oil fields in the Caucasus and along the shores of the Caspian Sea. Turkey would have been forced to become an ally or grant transit rights to German forces, Britain would have had to exert all its strength to protect India, and the Soviet Union would have gone to any lengths to preserve peace with Germany because of its perilous position.
Germany need not have launched a U-boat or air war against British shipping and cities, because British participation in the war would have become increasingly irrelevant. Britain could never have built enough military power to invade the Continent alone.
Unless the strength of the Soviet Union were added, the United States could not have projected sufficient military force across the Atlantic Ocean, even over a period of years, to reconquer Europe by amphibious invasion in the face of an untouched German war machine. Since the United States was increasingly preoccupied with the threat of Japan, it almost certainly would not have challenged Germany.
Thus, Germany would have been left with a virtually invincible empire and the leisure to develop defenses and resources that, in time, would permit it to match the strength of the United States. Though Britain might have refused to make peace, a de facto cease-fire would have ensued. The United States would have concentrated on defense of the Western Hemisphere and the Pacific. Even if the United States had proceeded with development of the atomic bomb, it would have hesitated to unleash it against Germany.