Answer:
He oppressed Buddhist worshippers.
Explanation:
Ngo Dinh Diem oppressed Buddhist worshipers since he was Catholic and banned many Buddhist traditions. Protestors hosted "barbeques"(public burnings of Buddhist people)Ngo Dinh Diem was firm on his word and refused to legalize it. Eventually, in November 1963, he and his brother got assassinated by their own military during a coup.