That was a "death of" article. I suspect there are articles that cover ISIS killing people, if they had only killed one person it might well be titled "death of". Since they seem keen to torture enslave or murder anyone who doesn't share their brand of Sunni Islam it would stretch our notability criteria to create separate articles for each of their victims. Similarly our 4.6 million articles only include individual articles for a small minority of the 13 million killed in the Nazi's murder programs.

Regards

Jonathan Cardy