In the last CTC Newsltter is a short article, it is slightly strange being based on survey research in Syria:
Over the past year, the authors have surveyed more than 300 FSA fighters as well as Syrian civilians and refugees and 50 Syrian Islamist fighters in the Islamic Front (Ahrar al-Sham) and JN, the latter of which is al-Qa`ida’s affiliate in Syria.
They conclude (cited in part):
At present, the authors’ research suggests that rebel fighters are generally revenge-seeking and driven to Islamist groups not primarily due to ideological motivations, but rather for instrumental reasons. However, once inside the group, they are vulnerable to elite manipulation. ....Islamist groups appear to be having great success harnessing and exploiting Syrian anger for purposes well beyond fighting the al-Assad regime, which is why the current drive in Islamist recruitment in Syria could have important spillover consequences for conflict elsewhere.
Link:https://www.ctc.usma.edu/posts/the-m...amist-fighters