Hezbollah Official Killed by Whom?

Article: A senior Hezbollah operative was gunned down by unknown gunmen as he got into his car in Beirut yesterday. Iran and Hezbollah blame Israel. The slain man, al-Laqqis, was a leader in developing Hezbollah's technological capabilities, in developing Hezbollah's aerial warfare, and in smuggling weapons to Gaza and Egypt (to be used against Israel). They claim Israel did it because it was a highly professional job--gunmen killed him at close range with a silent gun in front of his house.

Discussion:

• We spoke about Hezbollah in the last two weeks. What do you remember about the discussion? (It was the current event about Nasrallah's body armor and bodyguards). 
• What do you remember about who Hezbollah is and who funds them? (Terrorists; bad guys; Iran)
• If Israel did this, why did they do it and why won't Israel admit it? Why does Iran/Hezbollah blame Israel? 
• If Israel did this, how was this highly dangerous for the Israeli soldiers who killed al-Laqqis an? How do they escape from Lebanon now?