The unusually bitter dispute between European countries and Turkey over President Recep Tayyip Erdogan’s attempts to hold political rallies in their cities is sharply escalating as Ankara releases its long-simmering frustration at its perceived mistreatment by its allies. After its ministers were barred from giving campaign speeches in Cologne, Rotterdam and other cities last week, the Turkish government stoked the crisis by accusing the German government of “Nazi practices,” calling the Dutch “Nazi remnants,” warning that they will “pay the price” and telling the Dutch ambassador not to return to Ankara.