Hizbollah is tacitly backing the Lebanese army’s attempts to destroy Al Qaeda inspired Fateh Al Islam.
They have many reasons for this stance: Fateh Al Islam’s stated goal is to defend the Sunnis, against what they perceive as the heretical Shias represented by Hizbollah. Fateh Al Islam is also dangerously anti-Syrian – they have carried out a number of bombings across Syria in recent years.
Hizbollah and the Lebanese army have found their own specialisms: Hizbollah targets external threats, while promising never to target a fellow Lebanese. The Lebanese army, meanwhile, targets internal threats, while remaining neutral in the face of external threats (the army was ordered not to shoot during Israel’s attacks last summer).