There is a difference between Israel selling nuclear information to Saudia, which will surprise me if true, and helping Saudia develop nukes.
If Israel will help Saudia develop nukes, it means that it will have a stranglehold within Saudia maintained by the Mosad.
Israel has quite a grip within Iran, so it might be working on establishing a similar covert presence within Saudia.
It will also mean that Israel's abilities against rockets will soon be upgraded.
What I know about it, is that Israel's military industrial complex is strong enough to prevent Israel from adopting the US laser gun, and instead it developed and acquired its own inferior "Kipat Barzel" ("Iron Dome")
which is a crime committed by the Israeli government against its people, no different than everywhere else.
Israel also has missiles against rockets, "Hetz", which may be better than I thought if these dubious and probably fake news are true.
Whomever sells such information to Saudia is a true psychopath, but I acknowledged long ago that Israel's government and its parliament is composed completely, or almost completely out of psychopaths, similar to the rest of the world.