ANTANANARIVO, Madagascar — The streets of Madagascar’s northern city of Antsiranana filled with chants and banners on Thursday, as thousands of mostly young protesters demanded the resignation of President Andry Rajoelina. Demonstrators carried signs reading “Miala Rajoelina” — “Rajoelina, step down” — and accused the 51-year-old president of betraying their future. The protests are led largely by Generation Z activists, who announced a “strategic 24-hour pause” in Antananarivo to rest and regroup. “We are just young people ready to change the history of Madagascar,” one member said in a Facebook video. Opposition leaders, including former president Marc Ravalomanana, have also thrown their weight behind the youth-led movement.