If the whole situation show signs of stabilization, of course UN is the most appropriate solution.Not only for this country to avoid a civil war, but also to keep other neighbours from going in and have a piece, ( Turkie/Iran).
Thought we were discussing individual nation's possible involvement though.
As for the public's opinion and not the politician's, i believe that the UN solution is the most popular.
I may sound controversial , but i think global terrorism threat is a much more complicated (fanatical /social ) issue than keeping this country's unity