Among the throng of Columbia University student protesters gathered outside Hamilton Hall on campus early Tuesday morning was a gray-haired woman in her 60s. In a video captured by The New York Times‚ the protesters can be seen trying to push their way toward the building as the woman — decades older than the crowd — pleads with two young counterprotesters trying to block them from barricading the occupied building. “This is ridiculous‚” the woman says‚ as the men stand with their backs...