After more than 30 years of presidents from Bill Clinton through Joe Biden asking Europe nicely to assume more responsibility for the common defense, America has had it. Europe in general, and Germany especially, can no longer count on an eternal snuggle rug of American protection. … For many Europeans and their American allies, Mr. Trump’s presidency is an assault on democracy as well as on trans-Atlantic solidarity. For the president’s supporters, it is the Europeans who have betrayed the West. Foolish national-defense strategies, self-defeating economic policies, censorship, and suicidal cultural and immigration measures have eroded both the strategic and moral commonalities that once united the West. Europeans think Mr. Trump is betraying democracy by punching it in the face; Team Trump argues the Europeans have betrayed it with a kiss.