“Barretti, who is an ingenious writer, remarks that almost every nation hates its neighbours, without knowing the reason for such hatred. I once heard a Frenchman declare, that he hated the English, parce qu'ils versent du beurre fondu sur leur veau rôti. Voltaire said of us, though he did not hate us on that account, that we had but one sauce, and that was melted butter, to every thing. How strong are prejudices!”

Source: Wikiquote