Hassan Nasrallah has led the Lebanese militant group for the past three decades, transforming it into one of the most powerful paramilitary groups in the Middle East. On Friday afternoon Israeli airstrikes knocked out six buildings in Beirut’s southern suburb of Haret Hreik, the largest strike on the Lebanese capital in nearly a year of fighting between Israel and Hezbollah. The Israeli military said the strike, which killed and wounded dozens of people, hit the headquarters of Hezbollah in Beirut. Three major Israeli TV channels said Nasrallah was the target of the strikes in Beirut’s souther…