According to sources, Nasrallah received a warning from Iranian intelligence that Israel intended to kill him. Nasrallah responded by moving moved his hiding place from the A-Dahiya neighborhood in Beirut.
Lebanese sources said that Nasrallah believes that Israel would try to eliminate Hezbollah's entire top command hierarchy at the very beginning of the next war, through a preemptive airstrike. At the same time, it would hit s hitting the organization's precision missile reserves, which pose a threat to strategic targets inside Israel.
Nasrallah fears that Israel aims to eliminate the command pyramid of his organization at the very beginning of the campaign, which will be a severe operational and moral blow to Hezbollah's ranks.
It certainly makes sense. It would shorten the war, certainly.
Notice that Nasrallah was, and probably is, hiding underneath Beirut - meaning that he is using Lebanese citizens as human shields to protect himself. What a brave man!
The Lebanese should be the ones trying to assassinate Nasrallah. He's the one willing to fight Israel down to the very last Lebanese civilian.