Their effect, however, has been explosive. Andrzej Nowak, an eminent historian and adviser to President Nawrocki of Poland, said Merkel’s remarks harked back to an “imperialistic” German tradition of divvying up central and eastern Europe with the Russians. “It is in exactly the same line, seeing only the German chancellor and Russia as the two important centres of power … and disregarding voices from the countries that actually neighbour Russia as an obstacle to this wise, far-reaching concept of peace in east-central Europe, a concept that should be dealt with between Berlin and Moscow,” Nowak said, with bitter irony. He...