Germany is still split in so many ways. Just look at any map of demographics, pension, income, anything "social/society scale", the borders are clearly there still, somehow.
In the presence of more similar experiments, only with pure dogma or dishonesty that one can opt to infer the outcome based on far less similar and even less contemporaneous experiments.
So you think USA will go into Venezuela and do a complete takeover, rewrite it's constitution, and have troops there for 50 years to enforce the new order?
The US did not care at all about Japan had all kinds of nazi clubs in the country.
It only gave a damn from Japan to retaliate against it... And let's not pretend it became all sunshine and rainbows for Japan post WW2. Internment camps. No standing military. Huge cultural disruption.
SK who remembers the war doesn't have the best opinion of the US either. They essentially pulled out and did a half assed job. Who's even to say that a communist Korea wouldn't have been the best long term plan? It might have destabilized faster than what we know today as North Korea.
Korea is still a split country.
I guess I have to give you Japan, although now you could say "clearly the solution is nukes" if you're just going blindly on data.
Even if you think it's going to go well this time, you have to admit this sort of thing does not have a good track record.