SANTIAGO, Chile — Many watched in disbelief: There he was, Pope Francis, calling people in Osorno, a city in southern Chile, “dumb” for demonstrating against a bishop accused of being complicit in clerical sexual abuse.

“The Osorno community is suffering because it’s dumb,” Pope Francis told a group of tourists on St. Peter’s Square in Vatican City, because it “has let its head be filled with what politicians say, judging a bishop without any proof.”

“Don’t be led by the nose by the leftists who orchestrated all of this,” the pope said.

The video, filmed by an Argentine tourist in May, was obtained by a Chilean television station and broadcast Friday, quickly instilling doubts here about the pope’s commitment to protecting victims of sexual abuse.

Under a heavy rain, demonstrators with black balloons chanted again outside the San Mateo Cathedral in Osorno on Sunday as the bishop at the center of the controversy, Juan Barros, said Mass.