The slogan of the fliers was, "Do you want your grandson to be called Ahmad Ben Sarah?" The group began distributing "kosher certificates" to businesses that did not employ Arabs to encourage discrimination against non-Jews. In 2012, Lehava distributed fliers warning Palestinian men not to date Jewish women. In addition to opposing interfaith and interethnic marriages, and promoting discrimination against Palestinians and Arabs in employment, Lehava also has encouraged Israelis to report to the organization the names of Jews who rent to Palestinians, so that they can be named and shamed publicly. A group of anti-racist organizations petitioned Israel's Supreme Court against the state attorney, Lehava, and Gopstein. According to the petition, Gopstein had, in addition to promoting discrimination against Palestinians and other Arabs, praised a group of Jewish youths who attacked Palestinians in Jerusalem, leaving one victim unconscious and hospitalized. The court case is pending. In 2014, three members of Lehava were arrested, and indicted in 2014 for committing arson and spray-painting anti-Arab graffiti at the Max Rayne (Yad B'Yad) Bilingual School in Jerusalem. Gopstein, along with several other group members, was arrested shortly thereafter for incitement. In January 2015, Channel 2 reported that Defense Minister Moshe Ya'alon may be preparing to categorize Lehava as a terrorist organization. Ya'alon was reported to have ordered the Shin Bet and the Defense Ministry to assemble evidence required for the classification. The arson incident received international attention. Gopstein issued a statement harshly critical of Ya'alon:   A journalist participated in Lehava undercover and reported on Gopstein's leadership. Liat Bar-Stav described a meeting that Gopstein led for his followers, in which he said to them:   As the crowd responded with booing and cheering, Gopstein continued:   Before his Facebook account was permanently disabled, it had doctored images of Arab Israeli Knesset members who appear to be hung by the neck. Gopstein wrote a letter to Facebook founder and CEO Mark Zuckerberg protesting both Zuckerberg's marriage to a non-Jewish woman, as well as the Palestinian use of Facebook. He complained, "In Israel, too, assimilation is hitting us quite a bit because of your Facebook, where every Mohammed is 'CitySlicker' and every Yusuf calls himself 'Prince Charming'". In 2018, Gopstein started a fund raiser to raise money to sue Facebook for censorship.