Fans attend a concert by Marko Perkovic, the right-wing singer notorious for his perceived sympathy for Croatia's World War II pro-Nazi puppet regime, in Zagreb, Croatia, Saturday, July 5, 2025. (AP Photo) ZAGREB, Croatia — A hugely popular right-wing Croatian singer and hundreds of thousands of his fans performed a pro-Nazi World War II salute at a massive concert in Zagreb, drawing criticism. One of Marko Perkovic’s most popular songs, played in the late Staurday concert, starts with the dreaded “For the homeland — Ready!” salute, used by Croatia’s Nazi-era puppet Ustasha regime that ran concentration camps at the time....