Israel’s war with Hizballah in 2006 seems unrelated to today’s internecine strife in Syria. But in the view of Eyal Zisser, the two conflicts are connected by a thread that runs through the Israeli withdrawal from Lebanon in 2000, the Iraq war, Syria’s own withdrawal from Lebanon, and Iran’s expanding influence in the Middle East:
Both [the Lebanon war and the Syrian civil war] are manifestations of the inherent weakness of state players in the region, i.e., the Arab states of the Middle East. These states have been weakened and in some cases have all but disappeared, leaving in their wake a vacuum filled by quasi-state organizations like Hizballah and Hamas. . . .
More importantly, these two events are a blatant demonstration of Iran’s penetration into the Levant as part of its drive to attain regional hegemony. . . . In fact, the Second Lebanon War and the Syrian civil war have strengthened Iran’s presence in the region, even if the wars have taken a steep toll on [Hizballah’s leader] Hassan Nasrallah and on Bashar al-Assad, Tehran’s local clients. The situation presents Israel with a dilemma as to the right response to the challenge generated by Iran. . . .
Until [Assad succeeded his father, Hafez] in June 2000, Syria had been the entity that set the tone in everything having to do with Lebanon, including Iran’s presence there. Syria had a military presence in Lebanon and controlled the country with an iron fist, while more than once exerting a moderating influence on Hizballah. Moreover, all the political powers in Lebanon subordinated themselves to Damascus and even conducted their communications with Hizballah through Syria. . . .
After Syria was compelled to remove its forces from Lebanon in the spring of 2005, Hizballah finally crawled out from under Syria’s shadow, and together with Iran became the entity that helped Assad withstand the American pressure on him (in the wake of the September 11 attacks and the fall of Saddam Hussein). The Second Lebanon War intensified this trend, increasing the personal, political, and even military dependence of the Syrian president on Iran and Hizballah.
This dependence, and Iranian regional influence, have grown even greater since the civil war began in Syria.
Read more on Institute for National Security Studies: http://www.inss.org.il/publication/decade-decisions-lebanon-syria-second-lebanon-war-syrian-civil-war/