The who argument is pointless, the motivations that led to Hitler's rise to power were too great to ****, and removing Hitler would have done nothing to stop what had happened, after all the Nationl Socalist Party were in existence before Herr Hitler joined their ranks, even if he didn't come to power somebody else would have and we would have still gone to war and he was not the only man who followed their ideals after all Edward VIII was ruler of the Biggest Empire in the World and he was just as right wing.
Not please think about what I am going to write down next before yu start the demented honking.
We needed both the World War's, and I'm not saying that because I gained employment from conflict (I work in a military). both these wars showed mankind what the brink looked like so we could make sure we never see it again. The First World War was the great European War that had been brewing for centuries and when it finally came about every nation that forght wanted to fight, the one exception was America who had yet to emotionally recover from their Civil War. The First War was needed to ensure that War was trully the last resouce to be used with great reluctance, hence why Hitler was able to conqure half of Europe before Britain and France said enough.
The Second War was needed to show just how devestating total war can be, and why in moden conflicts nowerdays generals try to limit the amount of damage they can inflict on the enemy, and infantry troops are trained to wound the enemy rather than flat out kill them.
Finally their is the bitter irony both war, that men like Napoleon and Hitler, a men who wanted to be artists yet their actions became insperations for thousands of artists, writers, poets, film makers, composers, sculpters, architects, song writers and even some chefs.