Is this an isolated incident or is race-baiting the new normal? What impact will such incidences have on race relations in this country?

Kayla-Simone McKelvey, 24, of Union – a black alum who graduated in May – was charged by summons with third-degree creating a false public alarm.
Park said an investigation by the Union County Prosecutor's Office's Special Prosecutions Unit and Kean University police found that McKelvey, a self-proclaimed activist, participated in a student rally to raise awareness of racism on college campuses on Nov. 17, but left midway through and walked to a computer station in a university library. Once there, McKelvey allegedly created an anonymous Twitter account – @keanuagainstblk – and began posting threats of violence against black Kean students.
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http://www.nj.com/union/index.ssf/2015/12/arrest_made_in_kean_twitter_threat.html