NEW YORK —  Columbia University held virtual classes Monday on the sixth continuous day of student protests over the Israel-Hamas conflict. University president Nemat “Minouche” Shafik sent an email to the Columbia community announcing that classes would be held virtually. “The decibel of our disagreements has only increased in recent days,” Shafik wrote. “These tensions have been exploited and amplified by individuals who are not affiliated with Columbia who have come to campus to pursue their own agendas. We need a reset.” More than 100 students were arrested at the school April 18, after the university’s president authorized police to clear away protesters. Some of the students also received suspension notices from the school. Columbia’s action prompted an onslaught of pro-Palestinian demonstrations at other universities and responses from faculty and politicians. The arrests occurred after students calling themselves Columbia University Apartheid Divest erected dozens of tents on a lawn at the center of the campus, establishing it as the “Gaza Solidarity Encampment.” Following the arrests and the demolition of the original encampment, another pro-Palestine encampment …