Open this photo in gallery: Protesters and counter-protesters at a Students for Justice in Palestine demonstration at Columbia University in Manhattan on Oct. 12.BING GUAN/The New York Times News Service If you were to search for Dalida Alhaddad on the internet, you could be forgiven for wondering what kind of person she is. The second Google result for her name describes her as someone who “has spread incitement, expressed support for terrorists.” She has, according to website Canary Mission, promoted hatred toward Israel. The site has published more than 2,000 words about Ms. Alhaddad, saying she recommended a book written...