Columbia University has announced that classes at its main campus will be held remotely for the final weeks of the semester — as critics blasted the “weak” administration for allowing anti-Israel student protesters to shut down the college “in essence” and called on parents to seek tuition refunds. “It’s vital that teaching and learning continue during this time. We recognize conditions vary across our campuses and thus are issuing the following guidelines,” provost Angela Olinto wrote in a Monday night notice to students and faculty as the anti-Israel encampment on campus neared the seven-day mark. Classes on the university’s Morningside...