I think the whole thing can be simply young people trying to raise money? If they went into Government agencies to gather information? that does not mean anything either; Israel has unlimited access to all our military installations. So what is the big deal.
Actually, no. Especially when you consider that the allegation is that 60, or 120, full-time, long term, Israeli agents were involved. In other words, this is not something that could have been pulled off by one Israeli idiot--it would have taken a large part of their intelligence apparatus being idiots.
I think the stupidest part is the allegation that the Israeli spies were talking their way into U.S. government facilities, some military, some otherwise. At least before September 11 (may still be the same), U.S. military bases often had small museums or libraries open to the general public. Or sometimes you could talk your way (with a "VA" ID, perhaps) into getting the right to travel base roads, saying that it would be a shortcut to some outside place you wanted to drive to. So what? It's not like once you are in, there are top secret U.S. photos of the West Bank just lying out in the open. In all the true spy stories I've read, foreign agents who come here have to recruit American traitors, and there are no allegations of this here. Where is the Pollard, Rosenberg, or Hiss of this case? The whole thing does not make sense.
It is part of the Mossad's mission to protect Israelis and Jews all over the world. They are unique and very effective in intelligence gathering. I have heard that they are connected to the Anti Defimation League however.