A group of winter-sports athletes and the world’s biggest snowboard maker want the president of the International Ski Federation to resign after he spoke of “so-called climate change” and said he would rather deal with dictators than argue with environmentalists. The climate advocacy group Protect Our Winters sent an open letter Friday urging 75-year-old Gian-Franco Kasper to step aside. In an interview with the Swiss newspaper Tages-Anzeiger, Kasper said “dictators can organize (big) events … without asking the people’s permission” and that “from the business side, I say: I just want to go to dictatorships; I do not want to...