The jihadis are coming, the jihadis are coming!!
Internally, the various players may use the jihadists as a tool against the regime, even if they do not hold their ideals- they have seen they can topple regimes and elect Islamic parties without the unnecessary violence and terrorism.
On a regional level, Stratfor says the neighborhood may not be so against it, except for the Iranians of course.
See the whole analysis online here: Jihadist Opportunities in Syria | STRATFOR