Islamic State aims to use atrocities like Kabul to keep its name alive and become the 'go-to' organisation for brutality, according to a senior fellow at the Royal United Services Institute thinktank.
A bomb hit the diplomatic area of the Afghan capital Kabul this morning, killing at least 80 people and leaving more than 300 others injured. Isis has reportedly claimed responsibility for the attack.
Margaret Gilmore told Julia Hartley-Brewer that Isis wants to be the movement of choice for those who are depraved and sadistic. Its acolytes don't care whether it's Ramadan or not when they attack.
She believes the problem in Afghanistan is that there are so many groups of people vying for power and some groups are backed by foreign players.
Gilmore thinks Isis leaders are also looking for other places to set up headquarters such as in Libya and South East Asia.
Listen to the full interview above