Well a number of Islamic scholars here have issued a Fatwa against IS/ISIS/ISIL, whatever, calling them heretical and condemning their actions.
The group with the Fijians is another altogether, Al-Nusra. These are fitting both the above and the Syrian government. Indeed Israeli tourists have been up to the border in numbers to watch the conflict.
I hope it is true that a disillusionment is setting in among Moslems, and in particular some of youngsters who rushed off to fight with the Jihadists. Anything else is unthinkable. At least 500 from the UK and 1,000 from France.