It would never have occurred to me that a Greek would assume that Alexander the Great was just a local hero!
In the US, anyone who remembers any ancient history will remember Alexander the Great. He's a part of every single world history curriculum, and for good reason. Whether by his own skill or luck, he reshaped most of Eurasia in his lifetime.
I mean, it was in the curriculum in Fiji where I studied. Stupid of course, because we had to learn the histories of far away places (literally on the other side of the world) more than our own history.
Whatever late corner of earth that didn't yet know who Alexander the great was, that history was forever changed, once personal computers & the golden age of PC computing came to be.
The entire western world draws its cultural lineage through the ancient greek civilizations, most of us sub-consciously consider ancient greek history "our" history. Even relatively un-educated New Zealanders on the exact opposite side of the world know who Alexander the Great is.
Alexander the Great was taught in my US high-school world history class. I was very fuzzy on the details of his life (time period, exactly where he was from and what he did), but he was Kinda a Big Deal for the world, not just ancient Greece.
Isn’t Alexander the Great the most famous (at least in the western world) conqueror of all time? At the very least he’s up there with Ghengis and Atila.
But let me clarify from what I have read that it's just a conjecture and not a very strong one.