Individualism - like markets - is a philosophy for the strong, because in a conflict between a weaker individual and a stronger one, the stronger will always prevail. Morality is therefore necessarily socialist: only as collectives can we achieve equity and justice.
Nietzsche knew this, as did Hitler, as does Bibi Netanyahu: all are unashamedly sincere in their belief that the strong should prevail and the weak should be crushed.
This is a circle Rabbi Sacks cannot square. He's right, of course, to say that without morality all except the strongest suffer; but he cannot at the same time uphold the IHRA's declaration that defines the comparison I have just made as 'antisemitism'