The irony is that they're terrified of Iran getting the bomb because they think they're a suicide nation that would use them even though they know they'd get hit too.
Why is it ironic?
en.m.wikipedia.org
Israel itself would rather use nukes and risk complete destruction than ever let themselves be occupied or take the kind of brutality they dish out on others. Iran said "its over. It's shot for shot. We got our lick back"
But much like a man who needs to save face after being clowned, this Israeli government would rather crash out and take its whole population with it than take an L.