My understanding is that the secrets were traded by Israel to the Soviet Union in exchange for a loosening of restrictions on Russian Jews to emigrate to Israel. It was in Israel's interest to boost immigration as much as possible to counter Palestinian birthrates, and Russia was the greatest source of likely Jewish immigrants.
Countries don't have friends, they have interests. So our "friends" handed over the massive load of secrets that Pollard had stolen, including some of the very top secret NSA info.
Of course once Israel had all these secrets, they had the leverage to use them in other ways too. They are a small country in a difficult position in the world and they play hardball.
I think it's unlikely that Pollard knew about the eventual destination of the documents. But he should at least stay in jail permanently just for stealing the secrets.
Without any regards to the stance of Israel, Jonathan Pollard is a traior to America.
Let him sit and stew in prison. He can lick his wounds all day long and think of himself as a martyr.
Jonathan Pollard is an American traitor. If Israeli agents used him, too bad for Jonathan Pollard.