German President Frank-Walter Steinmeier on Saturday thanked the Italian migrants, once known as “guest workers,” who helped rebuild Germany after World War II. Italian guest workers made an important contribution to Germany’s economic rise, Steinmeier said at a joint event with Italian President Sergio Mattarella in Berlin. He said his country owed them gratitude and respect, not least because they often encountered prejudice and rejection in Germany. “It took a long time for our country, for my country, to recognize the remarkable achievements of those people who came to us back then,” Stein…