He said that once Russia has loaded the fuel into the reactor -- slated for Saturday -- Israel would no longer be willing to strike for fear of triggering widespread radiation in an attack.
"This is a very, very big victory for Iran," Bolton told The Jerusalem Post. "This is a huge threshold."
Bolton, who also once oversaw US non-proliferation policy, said that when Russia announced the plans to load the fuel last Friday, "the element of surprise was essentially taken away" from Israeli calculations.
Bolton noted that he doesn't "have a clue" as to whether Israel would actually attack, but he said, "If Israel was right to destroy the Osiraq reactor, is it right to allow this one to continue? You can't have it both ways."