The two had been close enough that the roommate had come to the bar mitzvah of Ms. Fisher’s brother. Ms. Fisher thought she had been careful to avoid inflammatory posts, but the roommate, Ms. Fisher said, accused her of racism. Around the same time, Ms. Fisher noticed something else strange. When they were in the same room, Ms. Fisher said, the big wouldn’t make eye contact with her. Ms. Fisher said that her big often posted about Students for Justice in Palestine, the campus group that Columbia had suspended in November for violating campus policies.

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Persons: Sophie Fisher, Fisher, Fisher’s, —, ” Organizations: Barnard College, for Justice, Columbia Locations: Israel, Palestine, Gaza