President Donald Trump’s Muslim ban not only has nothing to do with preventing terrorism, it also helps the Islamic State, or IS, and makes Americans less safe. According to data on terrorist attacks in the United States in the Global Terrorism Database compiled at the National Consortium for the Study of Terrorism and Responses to Terrorism at the University of Maryland, no American has ever been killed in a terrorist attack in the United States that has been carried out by a national of the now-banned countries.