Let me ask you two questions:
What has Lebanon gained by HA claiming they will destroy Israel?
What would Lebanon lose if HA stopped making such remarks and instead focused on international diplomacy?
You don't do diplomacy with the threat of a gun pointed at your head. That's called capitulation. It may be hard for you to absorb; but have you considered that maybe, just maybe Israel and the U.S are the aggressors? Radical idea i know...