WWII would be delayed until the nuclear age. All major belligerents will have nukes and still as warlike and immature as the 1930s.
It could all be ashes by now.
If all sides have nukes and everyone knows it, M.A.D. doctrine would be much more likely to take hold. As warlike as someone might be, the end of civilisation is firmly placed on the top of the "MUST avoid" list. The only people crazy (or stupid) enough to go through with a nuke war are Hitler and the Enclave. Neither exsist ITTL.
I don't know about the butterflies, but given that the First World War still happens and Germany loses, some nutcase that is not Hitler but identical to him in terms of fiery speeches and relatively strong ideology would come to power. That is, if the Communists don't beat him to it. Post-WW1 Germany had the perfect conditions for people like these.
People tend to underestimate how singular and remarkable Hitler`s rise to power was. Id place severe doubts in others doing something similar.
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kenmac, you`re back!
From my point of view a world without Hitler would be very different, maybe Stalin would be the conquer and try to take over all of Europe,
As much as I love Red Alert, the plausability of such a scenario falls apart on the seams.