What is wrong (or unfair) about questioning the state of Israel's right to exist, in particular, in its current location? It would be wrong to do so if such questioning was accompanied by certain prescriptions ("wipe them off the face of the planet" etc). But given that this was a recently created entity and that under dubious circumstances, it seems quite important, in fact, to question its right to exist (in its current or slightly modified form(s)).
As Noam Chomsky suggests, out of pragmatic reasons to ease the suffering of Palestinians, one can and should summarily accept a two state solution. But that reasoning is pragmatic, not logical/factual.
I might as well add for the record: I do not in any way endorse any form of violence against the people of Israel or Jews in general. Nor do I imply any resolution of the legitimate problems faced by the Jewish diaspora, though such a resolution should be an essential part of any examination of the question of Israel.
--ravi
-- Support something better than yourself: ;-) PeTA: http://www.peta.org/ GreenPeace: http://www.greenpeace.org/ If you have nothing better to do: http://platosbeard.org/