General gist seemed to be, detonate a stationary nuclear device and bluff that you have a working nuclear arsenal.
Israel's current policy of denying they have nuclear weapons apparently pretty much due to German policy. Germany gave them the industrial equipment necessary to make nukes, essentially under the proviso that they don't become an official nuclear country which would invoke non-proliferation concerns. If Israel is officially a non-nuclear country, well, obviously non-proliferation is not a concern. Israel also buys German subs and allegedly maintains their operational nuclear arsenal at sea.
The Germans weren't stupid, they just needed a fig leaf and obviously felt a moral obligation. I will say this. Good for Germany for quietly making up for the sins of recent past.
Excellent series on the subject:
http://www.spiegel.de/international/world/israel-deploys-nuclear-weapons-on-german-built-submarines-a-836784.htmlThe only part I don't get is why people have any questions about the circumstances. The Arab and Islamic countries around them want them destroyed. Either as a country, or as a people. Or both, of course. Israel does not want to go through another genocide. Shocking that. Only nuclear weapons are a pretty good guarantee that Arabic and Islamic countries won't invade in terms large enough to commit genocide. If said countries do not commit genocide against Israel, there seems to be no issue. I don't think anyone seriously believes Israel will intentionally pursue an unprovoked first strike policy.
Some folks are worried about the rest of the ME getting nukes. Now that's a valid worry. Israel is very unlikely to use nukes first and without cause. Other countries in the ME, who knows. Pakistan and India so far haven't nuked each other. Iran still stencils "Death to Israel" on their conventional missiles, so perhaps not a good gamble there.