Its only a similarity as to motivation of some. One size does not fit all.
As with any insurgency, there are (1) some insurgents that will never agree to stop. These must be killed or rendered so hopelessly powerless that nobody cares they are still alive.
(2) Others might be able to be convinced that the jihad is not what they thought it was sitting in front of their computers in their home country and now want to quit and go home.
In a "normal" insurgency (one without the religious otherworldly overtones of this one), Category 1 insurgents are relatively few and there are a lot of Category 2 insurgents who can be convinced to give it up because the cause is hopeless (Philippine Insurgency 1899-1902) or because the cost of continuing is too high (Boers in S. Africa) or because the political goal sought will be achieve as soon as the fighting stops (Malaya 1960, Algeria 1962).
In this one, I would wager that the Cat 1 bubbas are abnormally high. They just need to be killed in place. The Cat 2 bubbas will have trouble finding jobs when they get home, which is a cause for concern. Arab countries tend to have high population growth rates which makes it hard to find a job, but Syria has achieve a
-9.73% growth rate. It must be a worker's paradise.