I beg to differ.

1st Lebanon did not begin asymmetracally, or at least not overtly so. While it is true that both the PLO and the Syrian army proved less than capable to stop the IDF, both were organized and equiped like modern armies (the main exception being the PLO's lack of large armor units and air force). The insurgency phase didn't begin in earnest until after the IDF occupied Lebanon - and then it was headed (mostly) by the Shi'ites, who were either indifferent or supportive towards Israel during the initial fighting.

The main problem, IMHO, was that Israeli political leaders did not understand that the Maronite Christians, on whom they relied to establish a friendly regime, were incapable of delivering. The Christian day was all but gone at the time, and their insistance on retaining control of "greater Lebanon" (i.e. retaining large areas populated by Muslims or Druze under their control) had ensured that they will never again be the desicive factor in the country.

Perhaps, then, 1st Lebanon has more in common with "Iraqi Freedom" and its aftermath than with Afghanistan.