Simply, anti-Semitism is a persecution or a hatred toward Jews for being Jewish. \"And that's where we get really concerned, is when we see anti-Semitism kind of moving from the margins to the mainstream. According the ADL, 1,986 anti-Semitic incidents in the U.S. were reported to the group in 2017, a jump of 57 percent over the numbers reported in 2016. Incidents were logged in every state for the first time since 2010 and included, even, a big rise in incidents in public K-12 schools. But the overall spike in anti-Semitic acts is undeniable, and it prompts a simple question with no easy answers: Why?