I have read through most if not all of this thread.
A few caveats. It is NOT true that Nazi Germany wanted to conquer the world. Nor did Germany, initially want war with the United States. Nor could she have ever conceptualized a scenario where she could conquer the United States or really even the Americas--no power could since the British Empire in the mid to late 19th Century. Some say USSR during the cold war by invading via a Polar Route but I am not entirely convinced.
On this matter I highly recommend Hitler, Churchill, and the Unnecessary War by Patrick Buchanan. The seminal right-winger debunks this myth, and the myth that Germany wanted to conquer the world in World War One as well.
Beyond that, some of have asserted that Germany could never have won the war. This is false. Great Britain was very closely to seeking appeasement during the War Cabinet Crisis, the position sponsored by Halfiax. The world and Great Britan would have been better had they done. As it now stands, both Great Britain and Europe, inlcuding Germany, are slated to die out because of Great Britain's lack of vision and foresight.
There is to this day speculation on whether Sea Lion was at all feasible. Manstein speculates in his memoirs it would be possible even without total air superiority. As opposed to barge landings, Kurt Student recommended a heavy airborne assault. I am not sure--all of that seems incredibly high risk, high reward, but both of those scenarios were assessed with Dunkirk as that played out. Had Germany properly destroyed the Dunkirk pocket, there is no question in my mind that the United Kingdom would have been forced to sue for peace. The reasons why Hitler allowed Dunkirk to play out as it did are hotly debated to this but, but I am convinced that his sympathy and admiration for the British as fellow Aryans was a key factor.
Had Britain properly sued for peace, the United States would not have entered the war until much later if at all. Lend lease, attacking German uboats without provocation in the Atlantic (See USS Reuben James incident), being neutral in name only explain much of why Hitler stupidly declared war on the United States without pacifying the Unitied Kingdom and the Soviet Union first. Without these provocations in play, I doubt he would have forged an alliance with Japan, stupidly counting on the Japanese to attack the Soviet Union in the East (which they never did).
As to whether the world would be better off had Nazi Germany won, it of course depends what the context is. Supposing a scenario where Great Britain sues for peace, war with the United States could have been likely avoided,. Americans did not want to enter the war, and Roosevelt used Pearl Harbor, as well as anti propaganda, to gin up support for a war that Americans originally did not want. Right-winger Devon Stack discusses this at length in his critique of the new Ken Burns documentary on the United States and the Holocaust.
I myself sympathize greatly with the German cause, greatly admire the Wehrmacht, the German war efffort on the whole, but am quite averse to Hitler, just in the way many of his generals were, not the way the ADL wants. I find the barbarism he espoused against white gentile Slavs beyond repugnant, and it is also one of the factors that led to Germany's catastrophic and utter defeat--had Germany treated the Russians kindly and invaded the USSR as liberators, Germany would have overtaken the USSR very quickly.
In his Third Reich trilogy series, Richard J Evans describes the Holocaust as the largest hostage crisis in the history of humanity, and asserts that Hitler did not envision genociding all of European Jewry until International Jewry upped the ante by getting the United States involved, and in his view, causing Great Britain to refuse appeasement. His rationale is persuasive, and I wonder from that if HItler would have been less barbaric to white slavic gentiles if Churchill, Roosevelt and friends did not have him cornered. I am not sure about that.
I am convinced that a majority of the German Armed Forces found barbaric treatment of Russians and other slavs repulsive, although some did actively partake in atrocities. In Tapping Hitler's Generals, there is an account of a Captain of a Hauptmann who killed a Russian villager in cold blood who was sitting across from him at a tavern, then killed his wife, then killed the family's baby. The whole platoon was in outrage, the commanding officer demanding a court martial and execution. The Captain maintained he was innocnet because Russians are not people A Fuehrerbefehl came down that he could not be charged for murder because Russians are not people, but was still punished on lesser crimes. Sonke Neitzel, the author, tries to use this and other anecdotes to indulge in German War Guilt, to buttress the argument about the "Clean Wehrmacht Myth" is a myth, but I see just the opposite. His whole unit and the commanding officer were outraged and wanted him executed.
I mention this because, had the war progressed better in a scenario where Barbarossa was fought in the context of a one front war, I believe there would even less appetite for that sort of barbarism.
The myriad deficiencies of Hitler, morally and in terms of military leadership, are a real problem, and it is probably why Europe and the West won't be able to save itself, which I believe would require ending democracy and turning to hard-right authoritarianism that is capable of expelling third world peoples, censoring and banishing pornography, tap music, etc.
In spite of that, I am just not convinced that the Allies way of doing things is right and good as the masses have been deluded into thinkinng. Terror bombing schemes killing milions of German civilians, colluding with the Red Army's reign of terror involving wholesale murder and rape of Germans in East Prussia and Silesia. Had Germany won, there would be no race mixing. There would be no popular culture that would embrace odious figures like the Karadashians, Katy Perry, Arianne Grande. No Coco-Cola, no McDonalds. No blacked.com. The boomer generation would not be utterly convinced by the leftist hippie bullshit that defines them.