Whatever lesson one wants to learn the facts is Stephen Hawking boycotted the Israeli conference to protest Israeli occupation that Israeli think should be endorsed by everyone including Palestinians in perpetuity. Remember that this is not about the denial of Israeli right to exist but that of Israeli right to occupy, deprive any democratic right or even freedom of movement within Israel. So much for justice in Judaism.
Clashes between IDF and protesters in Bethlehem and East Jerusalem (Reuters)
from the article: The prophetic lesson of Stephen Hawking's Israel boycott