Well, on the "60 Minutes" program last night (2001/9/24), publishers of the major Arab newspapers in Cairo said as much as they wish it wasn't true, they do believe that it was Arabs that did the 9/11 deeds.
I have trouble giving the slightest creadance to the rumor about the early warning for Jews. I'm sure a simple statistical test, based on WTC casualties, can be made to verify the likelihood of anything like that.
On the other hand, if the question was did the Mossad have any idea what the al Qaeda plan was for that day and did they withhold that information, that's something else. On 9/11, and since I have asked myself the question "Who has benefited from this?". Well, besides the few terrorists that well executed a plan for Allah, glory and perhaps mythical virgins, the true and major beneficiary has been Israel. The Palestinians may have been dancing in the streets, but the Israelis were dancing in their hearts. I could sense the glee in even you in the way you interacted with Andrew and others who talked about nuking the Afghans. Yes, the US will now lead Western World in eradicating Arab terrorists and maybe more for good measure. Others fighting Israel's war. I don't know how good the Mossad is. They certainly are able to tell the time place and place of the political assassination targets. They certainly have had their spies in the US defense department. I've heard that, over the years, the Palestinians have killed 700 of their own as Israeli spies. Some probably really were. Who knows how many Israeli spies there are and where they are now. With Netanyahu testifying before the US Congress and the mayor of Jerusalem at "ground zero" and on CNN last week, they are working some plan to milk the situation. Anyway, I have my doubts about Israel.
We, Americans, need to collect the living bastards that made the dirty deed possible, try them, and execute them. We also need to figure out what made it possible and work, within Constitutional bounds, towards make it impossible.