Without Hitler, German fascism could possibly die in early stages. At the very least, we probably don't see the militarization of Germany occur quite so fast. So, Germany still has some averages left in the government. Italy is still fascist, but Mussolini never would have had the resources to lead Europe into a World War. Without Hitler and Mussolini personal bond the teamwork between Germany and Italy is much less than what had actually taken place. Any European confrontation is probably delayed until the early or mid 40's...if at all.
In the USA, black people suffer the same problems seen by the Jews of the Third Reich. Hitler's emphasis on how he wanted space for growth is reduced because the US has a ton of room in the west and the US has not lost territories that the public feels a need to reclaim. However, the economic situation is poor and nothing puts people to work like making war material. The US has two possible targets; Canada and Mexico. While Hitler was at war with the English, he also respected them. Had England not declared war on the invasion of Poland, Hitler would have been fine with no conflict.
Also, the US had fought with the English in WWI, less than 25 years previously. Therefore, territorial goals would be turned south, toward Mexico. War could kick off about as early as actually happened, but it would have lasted a very short time. No nation would care enough about Mexico to intervene. Mexico would fall quickly, but the terrain of Central America would stop any type of lightning war.
In the far Eest, Japan pushes for room, but doesn't have a wiling ally to distract the European nations from Japanese aggression against European possessions. Therefore, Burma, Indochina, The Phillipinnes and New Guinea are unnecesary, but the Japanese prosecute the war against the Chinese, the Koreans and possibly Russia much...