Meretz leader Zehava Gal-On reacted on Sunday to a fire set to the Hand in Hand school in Jerusalem, which serves more than 600 Arab and Jewish pupils from around the capital.
"How is it that the prime minister, [Benjamin] Netanyahu, has not spoken out against the hate crime at the Hebrew-Arabic school?" Gal-On asked.
She said that "first and foremost" it was the responsibility of the police to find the perpetrators, but it "is the prime minister's responsibility to condemn the act."
She also charged that the controversial "Jewish state" bill gave legitimacy to those who "want to use violence to show Arabs that they are second-class citizens."