There are three main (intersecting) orientations “mainstream” Sunni politics perceives (or deal with) more radical militant movements such the brief hollywoodean movement of Sheikh Asir, Jubhat al Nusra or Da’esh (ISIS).
1- To secretly feel that they are scoring points against their more traditional political enemy that is Hizbullah
2- To despise them but have no long-term political breath to do much about it and to prefer adopt piecemeal approaches, co-opting these groups for popularity/electoral reasons
3- To practice ostrich politics or avoid looking at the elephant in the room.
In either case, this is untenable especially with more powerful groups such as Da’esh that are highly strategic in their movements and that, by looks of it, definitely plan to eat little by little the border “Sunni” region of north Lebanon.
This will require a political consensus that neither the weak army institution of the army nor the various political force could muster during the short but turbulent history of the tiny republic of Lebanon.
So if I want to be completely pessimistic, I see that the consociational democracy formula, which is slightly reworked arrangement of the “strength of Lebanon is in its weakness” motto (Pierre Gemayel’s infamous statement), may pave the way for larger Sunni politics. It just happens that it comes (as is often the case) in a very violent and brutal way).