St. Michael’s College at the University of Toronto. Photo: U. of Toronto.

A graduate student at the University of Toronto, who teaches courses at the school, has harassed Jews and supporters of Israel on social media, using the pejorative “Zios” to refer to advocates of the Jewish state, the British activist group Never Again UK reported this week.

Tadhg Morris, who is pursuing his doctorate and is listed as an instructor in the Celtic studies department on the St. Michael’s College campus, caught the attention of Never Again UK when he began to “bully” the group online. “[He]…uses [T]witter to vent out his rage” when he is “no longer [able to] suppress his anti-Semitism,” it said.

Morris — a self-described “disgruntled old lefty,” whose Facebook cover photo is a 1959 picture of the late Cuban dictator Fidel Castro waving a rifle — has called  Twitter users “Zio f***wit,” and referred to the Jewish state’s military as the “IOF,” standing for “Israel occupation forces.”

Never Again UK also reported an online assault by Morris against Ari Fleischer, who served as White House press secretary for the Bush administration. Replying to a tweet by Fleischer, who is Jewish, about the deadly Jan. 7 terrorist attack at the Fort Lauderdale airport, Morris wrote, “And the f****er missed you.”

Neither Morris nor his graduate school adviser responded to The Algemeiner‘s request for comment by press time.

The University of Toronto ranked third on The Algemeiner‘s 2016 list of “40 worst colleges for Jewish students” in North America.