I know it was not necessarily the point of your article, but since you base your thought experiment on the example of Germany, let me add the following.

I think it is true that the German state has been heavily invested in the "Erinnerungskultur" and the notion of "never again" (at least after the '68 student revolts that forced a more open discussion about the issue).

A lot is indeed done to make sure it never happens again (which doesn't mean that it's not possible to encounter Nazis or their symbols in Germany). For instance a major part of the curriculum of higher education history classes in German schools are focused on the Third Reich and the Holocaust. So much, that it might actually result in a kind of tunnel vision of a history education. With supposedly good intentions, but still a tunnel vision.

I believe, the motivation driving this is a national guilt complex, specifically focused on the Holocaust against the jews. And the problem with complexes is that you are not able to judge the problem objectively. You are just reacting to avoid further pain.

I think, despite all the "good intentions", it leads to a paradoxical situation in German society that we see today. No matter if you call the crimes against humanity that are happening in Gaza a Holocaust or not, the German society is not able to look at the situation objectively (in fact they are probably the most biased western nation apart from the US in that matter). Due to their guilt complex, they are not able to acknowledge the crimes that are happening in front of their eyes, committed by Israel.

I guess, what I wanted to say is that even though Germany sometimes appears (and is used in your example) as a positive example of working through their historical guilt successfully, it is not entirely true. There is still such a long way to go.