I agree, but also - tomatoes and potatoes are from the Americas - so that pizza in Italy? It is ALSO 'fusion' food.
That's just how food works. People eat what's available, and more stuff has become available over the past few hundred years. heh.
I think the whole thing is silly. Enjoy good food! Who cares about the rest?
And sure, I make authentic creole dishes as well as southern, and some legit texmex. But if I didn't, if I made tasty food, who the hell cares? lol.