I think it's a little more straight forward than that. "We" told the Germans for decades that they were evil and couldn't really be trusted to have an army or they would go all Nazi again. We kept emphasising the inherited guilt, how it's in their blood and even the children whose parents were born after the war had a stain they could never wash off their souls. However, we said would overlook that so long as the Bolsheviks were still a threat to civilization and allow the Germans to be armed, provided they were kept on a very short leash. It's the same thing we told the Japanese and which had the same effect.In summary (and this does not just apply in this case, but also in many others across the western democracies):
Hostile adversaries’ information operations influence the public. Public beliefs and fears translate into pressure on political decision makers. These, then make (or defer) decisions based on the opinion of a mis/disinformed public in order to maintain their public support. They do not make decisions based on the reality of the situation, from which the public has been steered away by well designed and targeted information operations.
In such a way the foundation of defeat is laid down.
It was indeed a very successful information operation, and it was conducted by us. It was aided and abetted by "our" almost total control over global mass media, pop culture, cinema, books, humour, sport, video games, fashion, and international political movements. Our message permeated their existence, and they were never allowed to escape it. Any who tried were branded a Nazi and made an outcast.
And then the Bolsheviks went away and "our" reason for allowing the Germans to have an army went away with it. After another decade or so the Czar came back, but our message hadn't allowed for that one, and the decades long indoctrination program had become self sustaining and had too much momentum to stop.
So the inevitable has come to pass, and our indoctrination message is now deeply embedded in the culture of much of the German political scene. We said the German state cannot be trusted with an army, and a truly peaceful German state cannot trust their own army either as it will be permeated with hidden militarists. Have a watch of the video again if you missed the part where it was said the government don't trust their own army.
So we succeeded, brilliantly. And now we're stuck with it.