This article addresses one of the the issues raised in an earlier post which provided a statistical breakdown of the foreign fighters in Iraq and Syria. Tunisia was one of the largest points of origin in the Middle East. see: https://jtdevinemta.wordpress.com/2014/10/12/foreign-fighters-flow-to-syria-washington-post/
I also posted polling data from the region that suggested ISIS had very little support. The data did not cover Tunisia. It would be interesting to see how much of a difference there is. See: https://jtdevinemta.wordpress.com/2014/10/15/isis-has-almost-no-popular-support-in-egypt-saudi-arabia-or-lebanon-washington-institute/
IR Theory & Practice 