Original sentence: On February 12, 2015, the Islamic State of Iraq and the Levant (ISIL) released a report in their online magazine Dabiq, showing photos of 21 Egyptian Coptic Christian fishermen from Kafr el-Sheikh they had kidnapped in the city of Sirte, Libya and whom they threatened to kill to "avenge the [alleged] kidnapping of Muslim women by the Egyptian Coptic Church"
Edited sentence: On February 12, 2015, the Islamic State of Iraq and the Levant (ISIL) released a report in their online magazine Dabiq, showing photos of 21 Egyptian Coptic Christian fishermen from Kafr el-Sheikh they had kidnapped in the city of Sirte, Libya and whom they threatened to kill to "avenge the kidnapping of Muslim women by the Egyptian Coptic Church"