In 56,67 wars the Arabs might have had more equipments, nothing for sure apart from the 400 Egyptian warplanes that were destroyed in 67 on their open airfields, but Usrael always had better equipment, the West has always looked to that and assisted Usrael with money, latest weapons and more than often times with physical presence.
Actually everyone knows that they are mostly atheists, and it is the moral and material support they get from all the western world that keeps them alive. Take these submarines for example; while any other nation on earth would have to pay 600 million $ for each, Usrael is getting them for less than 200 million $, if we count the ones for free and the half priced ones, and even this billion $ (for 6 most sophisticated submarines) or so is going to be paid by foreign military aid.
they were smarter a too big word to use, the truth is that most if not all the neighboring countries were just getting their independence and not very well organized, also they were not allowed to arm as they wished or could., While the Usrealis brought their WW2 experience along the Brits to the middle east.
Anyhow these new subs are going to be armed with missiles as well as torpedoes, nuclear missiles are a myth in my humble opinion. their weakness is that they have to be contained in the Mediterranean see in order to protect Usrael, if they venture out the won't have the range to hit anyone of their enemies. and the Mediterranean is not an open sea like the Atlantic, the Pacific or the South Asian sea. being contained in that Area which is roaming with all kinds of merchant and navy ships and submarines of other nations, makes their role a very limited one to the defense of the shores of Usrael.