When Hamas-supporting Columbia graduate student Mahmoud Khalil appeared in court on Wednesday, he was represented by, among others, Ramzi Kassem, a lawyer perhaps best known for defending al Qaeda terrorists. The Syrian-born Khalil had his green card revoked by Immigration and Customs Enforcement over the weekend as part of the Trump administration's crackdown on foreign nationals involved in pro-terrorist demonstrations at universities. Kassem has represented terrorists including Ahmed al-