War has influenced the slurs in our language more than anything else.
For example, when a soldier runs from battle the French say he’s gone traveling “English style,” while the English say he’s on “French leave.”
During the Anglo-Dutch wars of the seventeenth century, British insults were that “Dutch courage” came from a bottle.
A “Dutch treat” meant that everyone paid their own way, which of course was no treat at all.
When two people share the cost of a date, we say they’re “going Dutch”.