At Virginia Tech, graffiti was written on the walls of a bathroom that read “I will be here 11/11/2015 to kill all muslims [sic].” At American University, threatening posters were hung with one that...

At the beginning of every math class, Xavier* ’16 opens up his laptop to take notes – at least, until he becomes bored or does not feel the need to pay attention any longer. Then he opens up his web...