New data shows hate crimes against Muslim Americans and U.S. mosques have tripled since the Paris attacks. The hate crimes include violent assaults on students wearing headscarves, vandalism and arsons at mosques, and shootings and death threats at Muslim-owned businesses. The study was performed by the Center for the Study of Hate and Extremism at California State Univeristy, San Bernardino. It shows there have been 38 Islamophobic attacks since the Paris attacks on November 13, a little over a month ago. The frequency of recent attacks is the highest level of Islamophobic hate crimes the United States has seen since the aftermath of September 11, 2001.