Hitler was a double edged sword, they needed someone to work them up to do it, but no one needed that spoiled child micro-managing "literally" everything.
Death camps were totally stupid. That made permanent enemies out of people that weren't even born yet. Work farm like prisons have now. Have them grow their own food & extra.
I don't think they should have done it (war) at all, but .... it happened.
With expanded resources raw materials/personnel from potential friends/(ah-hem) "brothers of the cause" of attached/liberated (whatever syntax-semantics the spin doctors want to call it) peoples/countries/territories.
Ol Adolf buffaloed/bullied a lot of people with nothing more than words. If he would have stuck to politics (BS), and (as Framer said) let go of the ...."I wanna be a General" baby fit stuff, a much harder immediate future may have resulted for the rest of us.
Thankfully many of his disastrous (battle/campaign/war/production/invention/distribution/supply/allocation) defeats can be attributed directly to him, and that attitude.

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Morbius, Morbius! Something is approaching from the Southwest. It is now quite close.