Given a chance would you kill baby Hitler?

[Wyrd of Gawd]

I agree with most of what you wrote except this:

He didn't have a navy or an air force.  He didn't have any useful weapon systems and he couldn't support his troops in the field.  

Setting aside the fact that the Luftwaffe was a formidable CAS air force of 3300+ machines at the beginning of Operation Barbarossa in June 1941, the Germans had a potentially war-winning weapon against the Brits in the U-boat. Had they decided to concentrate on building those instead of fulfilling Plan Z, they could have erected a blockade that perhaps could have won the war for them.

Sure, Germany had a few good fighter planes but it didn't have any long range heavy bombers.  It had some submarines but it didn't have a fleet of battleships and aircraft carriers.  It didn't even have any row boats to use to invade England.  It didn't have any effective weapon systems except for tanks and a few V2 rockets, which didn't carry effective warheads.  Hitler couldn't stop the Allies from bombing Germany at will 24/7/365.  He couldn't maintain his army in Russia and couldn't keep them supplied.  He could never reach the Russian war industry.  He was basically an idiot as a military commander.  If he had had any worthwhile military commanders they would have blown his head off for being stupid.