I think many non-Jews don't realise the tremendous emotional heat that is involved here in the second half of the twentieth century. A heat that derives from the Holocaust. That is to say the destruction, the mass murder of the Jews in Eastern Europe where most of the Jews were. That both the Israelis and the Jews of the United States are the bereaved children of that population who were murdered. And the bond between the Jews of the United States and the people of Israel has the emotional intensity derived from that common bereavement. And that is what gives. I do understand that people resent the power of the pro-Israel lobby in this country [the US], but that power derives from that elemental basic bond of the common bereavement and the horror that is there in the background. Therefore, Jews in the United States do react strongly – and that's what makes this a very powerful lobby, and it is – they do react strongly to anything that seems to them to threaten the connection of the United States in Israel, which is Israel's lifeline. They see this as threatening. This may be an exaggerated fear, but always there is the shadow there of a possible new Holocaust. Israel overrun. The people of Israel massacred again.
Conor Cruise O'Brien