A far-right Austrian nationalist has been banned from entering Germany after addressing a meeting about mass deportations that provoked mass protests across the country. Days after he was deported from Switzerland, Martin Sellner, a leader of Austria’s ethno-nationalist Identitarian Movement, posted a video of himself on X reading out a letter to his lawyer that he said was from authorities in the city of Potsdam. The letter said Sellner was barred “with immediate effect” from entering Germany for the next three years and could be stopped or deported if he tried to enter the country. If he happened to be...