How does Philip Weiss know about the armament configuration of Israeli subs? Just because a sub can be nuclear-armed doesn't mean it is. What are Philip Weiss' credentials? Is he an insider into Israeli operational procedures?
Nice video of a periscope. No markings anywhere. Not nearly enough is seen for positive identification. That might have been an Iranian sub for all we know. It seems mighty convenient for the periscope to look directly at the boat, but stay there to pose for video.
On the other hand, I think we do have subs operating in the Persian Gulf. But when we call them "nuclear subs" we are referring to their power plant, not necessarily how they are armed. That's classified information that the press cannot know about.