The Arabs are famous for spluttering out tough talk. In the back of their minds, they know the Jews have the atomic bomb poised on missiles, and have sworn to use them if they felt extinction was coming.
Considering how the mighty Arabs like to go to battle with women and children as shields shows that they don’t really want to die.
The question isn’t just “Does Israel have the atomic bomb?” (which it does), but does it have the hydrogen bomb?