A couple of days ago, Jeffrey Goldberg explained why he was disinclined to associate with J Street, in spite of his sympathy for a two-state solution:
So I'm comfortable in many ways with J Street's basic worldview. On the other hand, I don't think the group has put forward a well-articulated vision of what a progressive Jewish democratic Israel should look like. This might be because, in addition to having progressive Zionists as members, it also has anti-Zionists (these are the types who are happy with Stephen Walt's tragic endorsement of the group) and it's obviously very hard to put forward a positive vision of a Jewish Israel when some of your important supporters -- Bernard Avishai comes to mind -- don't even believe in the idea of a Jewish state.
Now Goldberg denies that "anti-Zionists" like myself are actually keeping him away from J Street's conference. We would know this, presumably, if we had read a different one-line blog post, in which he says, with obvious sarcasm, "I'm sorry I'm going to miss this conference" (which, in context, if you follow his link, reads like "I'm sorry I'm going to miss this circus"). Then, en passant, Goldberg explains his evidence for my "anti-Zionism."
On the more important question of Zionism and anti-Zionism, all I think I need to say is this: Avishai, the author of a book called "The Tragedy of Zionism," believes that Israel's Law of Return should be repealed. This is the law that grants Jews anywhere in the world to claim citizenship in the newly-reconstituted Jewish state, which was meant to be a refuge for persecuted Jews. The law is the raison d'etre of Zionism, and of Israel's existence. I don't think I was being "vicious" in pointing out that Avishai's conception of what Israel should be is very different from the mainstream Zionist position. By the way, J Street's position, as officially enunciated by its head flack to me, is that the group's core mission is to preserve Israel as a "Jewish democracy." Though maybe I should ask J Street if it believes the Law of Return as currently written and implemented is undemocratic.