I see the collapse of US diplomacy, and the weakness of European diplomacy (both separate and as a block) as pivotal for the danger of an all-out (unconventional?) war breaking out in the region. Assad has less and less to lose, so Iran may give the order to Hezballah, Hamas and Assad. Egypt's Sinai under a swiss cheese of preventive measures by the current Egyptian junta, adds up for a very dangerous recipe. The Palestinian UN bid may also play a role. The entire region, from Turkey to Libya, from Yemen to Syria, from Lebanon to Bahrain, Al-Qaida's losses and the internal Iranian situation are so volatile, that it can erupt like a volcano, with a single match.
Joint Arab List Chairman Ayman Odeh rush to hospital with chest pain (Haaretz)
from the article: IDF Home Front Command: Likelihood of all-out Middle East war increasing