No, it can't. Europe in the early 20th century mass imports food from the colonies and focuses on manufacturing, high tech etc. This cannot abruptly change in a few years and even if it did (which it couldn't) this would severely damage war production and the German war with US/UK.
That's the UK - France and Italy were both exporters of food, and again, you are handwaving the enormous impact of mobilising millions of men, and logistical resources to invade the USSR, and it's impact on food production.
The mobilisation and invasion of the USSR helped re German and German occupied europe's food insecurity because all the soldiers and horses invading the USSR were being fed from captured territory.
Well no, they weren't, outside of one year, it always needed food supplies. And again, we are ignoring the massive fall in production due to the invasion.
Showdown is preordained because Germany has such a strong militarist tradition,
And French and UK Empires are what?
the treaty of versailles was so humiliating and this can only end in a general european war.
Against France, Poland, and the UK, sure. Russia, not so much - It was, and would in this TL too, be just as revisionist as Germany.
When this happens, Britain will cut Germany off from the world market to starve them into submission just like WW1.
And if we give alt!Germany France it doesn't matter, Both because with France and Spain, the UK can't fully blockade, and because there isn't a front.
Germany won't surrender because the blockade is performing a genocide on non-germans.
Nope, Russian transportation infrastructure was no way near good enough. The Nazis planned to move loads of people east because they could not move enough food west. And Russian transportation infrastructure will be much poorer without the high speed industrialisation with terrible human consequences practiced by the USSR.
Yes, but if they don't have anything to sell, there isn't anything to transport. Or put another way, there will be transport capacity.
Is massive rationing in all Nazi occupied europe and massive death by starvation in German occupied Poland.
Not my point - My point is if Alt!Russia can't supply them, they aren't in a position to start the war.
Because if a militaristic German european hegemon makes peace with the US/UK/France and is reopened to the world market it will be so much more powerful than Russia. Why would it not attack? Best security is alliances.
Because last time around, it fought Germany, and lost everything, and France and the UK exploited them as a punching bag.
They won't give two shits about Germany dismantling France.