At that time, his political views had begun to change, becoming critical of many policies of the Israeli government. He opposed the 1982 Lebanon War, and when he was called up to serve in that war as a reserve soldier in the Engineering Corps, he refused to perform field tasks and instead did kitchen duty. He also campaigned for equal rights for Arab Israelis. In March 1984, he formed a left-wing group called "Campus" with five Arab and four Jewish students. He became acquainted with many Arab students, including pro-PLO activists. Vanunu was also affiliated with a group called "Movement for the Advancement of Peace". He developed a particular resentment for what he viewed as the dominance of Israeli society by Ashkenazi Jews or Jews of European origin, and the perceived discrimination against Sephardi and Mizrahi Jews from the Middle East and North Africa. He felt that he was looked down on by those who ran the Dimona facility due to his Moroccan origin. According to Dr. Ze'ev Tzahor of Ben-Gurion University, "he projected a deep sense of deprivation. He assumed an Ashkenazi dominance in Israel that encompassed all social strata and an Ashkenazi consensus closing off all possibilities of advancement for Oriental Jews." According to "The Jerusalem Post", Vanunu's anti-Ashkenazi feelings morphed into anti-Jewish and anti-Israeli feelings, and he became the principal advocate for Arab students on campus, arguing their case with what other Jewish students saw as irrational intensity. He became known on campus as a radical. His activities drew increasing attention from his employer.