JERUSALEM: After this week’s murder of an east Jerusalem Palestinian, calls to inflict violent revenge on Arabs over the killings of three Israeli teenagers have gathered momentum on social media websites. Such incitement, including by serving soldiers, has featured photos on Facebook and Twitter and prompted Israel’s authorities to urge restraint and threaten the culprits with disciplinary action. The abduction and killing of three Israeli teenagers in the West Bank in June, which Israel blamed on Palestinian Islamist movement Hamas, ignited intense public grief and an outpouring of anger. Fears are growing that such anger may have been channelled into action Wednesday when a Palestinian teenager was abducted and murdered, apparently in a revenge attack. In an increasingly tense atmosphere, calls on the streets for revenge have spread to the web, with one Facebook page labelled “The people of Israel demand revenge” getting some 35,000 “likes” before it was removed on Wednesday evening.