The Islamic State calls upon disaffected Muslims in Western countries to emulate Mohamed bin Maslama, Abdullah bin Unais, Fairus bin Dulaymi – terrorist contemporaries of the "prophet" Mohammed who did his bidding.
Bios via Wikipedia:
"In 624, Muhammad ibn Maslamah volunteered when Muhammad called upon his followers to kill Ka'b, a chief of the Banu Nadir, who had written poetry which Muslims found offensive." [emphasis added]
"…it was reported that Khaled bin Sufyan Al-Hathali…considered an attack on Madinah and that he was inciting the people on Nakhla or Uranah to fight Muslims. So Muhammad sent Abdullah ibn Unais to assassinate him. After cutting off Sufyan bin Khalid's head at night, Unais brought it back to Muhammad." [emphasis added]
"He was sent out by Muhammad to assassinate Aswad Ansi, who had claimed prophethood in Yemen." [emphasis added]