Please recall that Israel assasinated the previous leader of Hizbollah in 1992. I don't think Nasrallah learned the lesson you mean. Both Nasrallah and Olmert would turn back time by 8 weeks if they could. The difference is that Nasrallah can admit this openly and Olmert can not.
Second rocket fired from Gaza explodes inside Strip (Haaretz)
from the article: Who's in the bunker?