Ah. I'd actually argue (as a historian and archivist), that this is a bit more (and less) than what Americans/Brits/Italians think of Rome. Or the like. Partly because most people get their historical knowledge while in elementary/high school, and then just coast on the vague memories of it for the rest of their lives. For example, when I was a kid, the big thing was the Greeks creating and passing the Torch of Freedom (and knowledge) to the Romans, then the lull during the dark ages, where it was picked up by Britain and France and finally passed to America... and everyone else kinda didn't matter.
But at the same time, various historians and historical schools of thought were going through generational changes (particularly post WWII and post Vietnam), with the American schools consistently about 20 years behind the European ones. So while the above narrative was propagated after World War 2, it was still being taught to kids by teachers who learned it while in University when it was still the dominate position. Yet the historical profession had moved on to other ideas (particularly history as science nonsense and later micro-histories, which were popular during my post-grad work).
But yeah, to go back to what you're referencing, yes. Historians are profoundly influenced by their own period, and it has a huge influence on what they write. The post-WWII historians in the US were (ironically) really high on nationalism, which lead to the 'torch of freedom' narrative, which generally came across as really tone-deaf to the European historians at the time, who understandably had a much more negative view of nationalism and where it leads. I've known archaeologists with socialist leanings who argue that 'of course' stone age societies were inherently communal 'because obviously.' In many ways (and this is true of fiction authors as well), histories are usually far more reflective of the author than they are of the society being studied. In many ways, it is more true than ever, since the current gibberish is if you acknowledge your biases, you're completely absolved of any sins committed while writing about them. [But that may be my own bias speaking, since I'm far more an archivist than historian these days.

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