The other context around Israel invading Lebanon in 1982 was given to me (I was too young at the time to have a clue about anything) by another (Jewish) friend, a biographer of Primo Levi, who said, "I believe Israel had the sympathy of the world until they invaded Lebanon," in a conversation about how those who claim to be virtuous by invoking victimhood.
Dahl never invoked that himself, but with wider knowledge of his life and a more critical view of Israeli history, we can see what a complex polarized mess this is with little chance of redemption for either, although it is interesting that one man has generated disproportionate column inches compared to a country.