Why is it that most major disputes between the United States and the European Union have to do with travel? First it was the war between Boeing and Airbus, then the furor over personal passenger data, and now it’s a new fee Washington is about to impose on visa-free travelers to the United States.

It was stunning to read a public statement by the EU’s top diplomat in Washington earlier this month that was anything but diplomatic and compared America to Alice’s Wonderland. It seems the Europeans have had it. They can’t quite understand why Washington is so intent on making traveling to America more difficult for them year after year, coming up with one policy or requirement after another…