My area of expertise is Islamist radicalization and Islamist terrorism. Certainly at the top of the list would be Qatar. Either directly—not so much as before, because of pressure from coalition partners, especially the U.S.A.—or through private individuals, Qatar is still funding both terrorist entities in places such as Mali and elsewhere and Islamist organizations in places such as Canada, the rest of North America, and the U.K. They would be very much at the top of the list.
On April 23rd, 2015. See this statement in context.