1940s Germany is not the issue.
If it's going to take over Europe, it most certainly is. I'm going to ask you a direct question:
Which is better: Europe united under a murderous dictatorship or Europe divided under democracies at peace?
It's how the tea-suppers viciously stonewalled any attempt to build the unity of Europe from Charles V to federal EU.
"Viciously"? You seem to believe that all Europeans feel the same rabid nationalism as you do. In fact, Europeans themselves have been foremost in foiling oneanother's bids for Universal Monarchy. Of course we've bankrolled them since this has often been considered a matter of national survival for us (your argument is also dependent on assuming that for Britain to follow its self interest by dividing Europe is bad because Britain is evil, whereas for Germany or whoever it is to follow its self-interest by establish hegemony in Europe is good), but lets look at it: what did we even do to Charles V? Then there's the Armada-period. So we defended ourselves from invasion, big deal. We also meddled in the Netherlands and France, but the Dutch and French had set the ball rolling by rebelling in the first place. Bourbon dominance was opposed at every turn by the Hapsburgs and vice versa right up until Napoleon, who of course had only a very few allies who were actually interested in the survival of his empire: when he was no longer in a position to hold the axe over them, practically everyone except the Danes and the Poles turned on him with the very nationalism he had unleashed. If all Europeans craved unity and only Evil British Scheming kept them from their destiny, why didn't the Continental System
work? Not to mention the protracted period, mostly during the 18th Century, when Britain had governments commited to keeping us out of Europe (that was a substantial part of 18th century Toryism) because it was assumed that the "Balance of Power", ostensibly our invention, would look after itself. When WW1 rolled around, shouldn't the French people have risen with one voice to welcome the Germano-European Liberator and expell Perfidious Albion? Or maybe France actually
wanted to foil Germany's hegemonic bid. They might not have succeeded without our help, but they wanted to, so evidently you want to impose European unity on unwilling Europeans. Of course by stopping Hitler we did our greatest possible service to humanity and nobody but a madman could deny this. And now we are of course sabotaging the EU.

I blame Poland.
It's the bloody "balance of power" thing that needs to be punished.
Nothing needs to happen. History isn't just. Its ruled by the iron and arbitrary fist of plausibility, trapped in the heavy cage of causality.
And of course there's the fun in making the paranoid delusions of Euroskeptic loonies about the "European fascist superstate" actually realized.
Except that fascism is inherently unfunny.
I have no association with these paranoid loonies, but I do think that your willingness to subject Europe to bloody dictatorship for its own good puts you in the analogous camp of Europhiles.