JTA — After the Guardian reported on Sunday that hundreds of Northwestern University students were being blocked from classes after they refused to watch an antisemitism training video, the school offered a clarification on Monday: The real number of students penalized is less than three dozen. But other elements of the story remain unchanged: The students are boycotting the video over what they allege is “biased” content in the video that the university began requiring this year in response to antisemitism allegations tied to pro-Palestinian protests on campus. In a letter to Northwestern administrators last month, over 200 students, faculty...