Earlier quoted context omitted.
A German friend phrased it this way for Americans: We have beers older than your country. The depth of history and culture in Europe never ceased to amaze me while I was travelling there, especially in Greece and Italy. I grew up on the prairies in Canada, there was pretty much nothing there 120 years ago.
The largest city in the "middle ages" was in the US. Europeans trot that "no history" story out because saying "... and then Europeans engaged in the largest genocide in human history" doesn't feel as good, I guess? There was definitely an interruption and a regime change — Europe's got a lot more of those a lot more recently than the US — but the history is there, if you care to look.
Also, all of the Americas gets historical short shrift from the old world: my point still stands: there was a concerted effort 500 years ago to exterminate the natives, and the results of that plan continues to this day when people say “X doesn’t have any history”.