Quote from goldenarm:
France's involvement in Israel's nuclear program ended in 1962.
As early as 8 December 1960, the CIA issued a report outlining Dimona's implications for nuclear proliferation, and the CIA station in Tel Aviv had determined by the mid-1960s that the Israeli nuclear weapons program was an established and irreversible fact.
http://www.fas.org/nuke/guide/israel/nuke/
At that time the program was well underway and Israel did not need either France or the US. Read the whole document my ignorant friend, at no point of time was the US involved in helping Israel develop nuclear weapons (it was in fact trying to interfere and stop the program).