The Massachusetts Institute of Technology defended a professor who repeatedly harassed a Jewish student until he dropped out of school and an instructor who served in the Israel Defense Forces, according to a federal anti-discrimination lawsuit filed against the university on Wednesday.

Linguistics professor Michel DeGraff allegedly started targeting a student, William Sussman, after Sussman complained about a seminar titled, “Language and linguistics for decolonization and liberation and for peace and community building from the river to the sea in Palestine and Israel to the mountaintops in Haiti and beyond.”

DeGraff accused campus Jewish groups, including Hillel and Chabad, of funding the spread of a “Zionist mind infection.”

He allegedly sent department-wide emails threatening to use Sussman as an academic “case study” of the “Zionist mind infection,” which he has described as a result of “settler-colonial Zionist propaganda,” the complaint from Louis. D Brandeis Center for Human Rights Under Law reads.

According to the complaint, DeGraff’s “harassment was so extreme and intolerable” that Sussman felt he had to “leave MIT and abandon the course of study he had been pursuing.”