A French court acquitted the Jewish historian Georges Bensoussan of hate speech charges over his assertion that Arabs receive anti-Semitism with their “mother’s milk.”

The 17th Criminal Tribunal of Paris acquitted Bensoussan on Tuesday, the AFP news agency reported, ending a polarizing trial that observers regarded as a significant test case for determining the boundaries of academic freedom amid growing inter-ethnic tensions.

Bensoussan, a scholar of the Holocaust and one of the world’s leading historians of Jewish communities in Arab territories, was put on trial in December after a Muslim lobby group and a French human rights organization that was founded by Jews in the 1920s initiated a criminal lawsuit against him for a statement made during a 2012 interview.