El Grecko writes:

...in BeNeLux, with Dutch and Belgians (who actually have a deeper mistrust of each other than the Greeks and Turks) in 1990-93

Did you mean this, or are you referring to the friction between the Dutch (Flemish speaking Belgians and the French (Waloons) speakers.

If you did mean what you say, then I'm sorry, it's nonsense. I lived for ten years in Holland and ten years in Belgium.