As opposed to the Communist's mass executions, enslavement, rape, subjugation and paranoid terror? Hello, Stalin killed way more people than Hitler ever did. He sent people away to Siberia to toil away to death in weather cold enough to freeze your nuts off. After the capituation of the Third Reich Stalin actually ordered that the soldiers of the Red Army be allowed three days of rape, plunder, and murder. As for the paranoid terror have you ever heard of the Great Purges? The Communist's were much worse than the Nazi's. However the Nazi's were still bad. (Just to clarify, I am not a Nazi, I just get pissed at Germany being singled out all the time. Throughout history things like the Holocaust were pretty common in wars.)
On the German-Japanese war. It would not have happened. After the Allies were pushed out of Europe, America would have sent everything against Japan. Even if Japan could stem the tide of American soldiers and win or fight to a stand-still and an armistice there would be no war. The Japanese were declared "Honorary Arians". So that would have been problem for the Japs and the Germans to get along. Another point would be without Japan as an ally Germany might as well have been alone. Italy was almost as worthless in that war as France was. And as for the Allies coming back into Europe. Not happening. Without England as a spring-board for the Invasion of Normandy the Americans would have no way of getting into Europe. And without the Soviets the Americans would have been utterly crushed in every meaning of the word. Americans over-estimate their importance in the war. It was the Soviets that won the war. They had the manpower and they repulsed German troops America just opened a second front* which just diverted German troops.
Second Front * Actually not the second but the third (There was the Italian front after Operation Husky.) it is however commonly called the second front.
Well even if you compare the eleven years of Hitler's rule and eleven years of Stalin's rule it's still higher. Heck Stalin actually signed individual death warrents every night. He even ordered his soldiers to clear minefields by marching over them. What kind of leader is that?