Do you think its possible that given a chance (having adequate military hardware would do) they would try and a bit of substance to their threats?
That's pure fantasy.
Iran would get shit-canned.
Arab neighbours of Israel tried to wipe it out not once but six times, I do think that Israel has more than enough reasons to be apprehensive.
Well, this is about Iran.
But the Arabs did not try and wipe out Israel six times (you mean five times). Not even one time. That is a myth.
Zionism was instrumentalized, and Israel created, by the imperial powers in opposition to Arab nationalism. The Arab countries made the most ethical choice by rejecting the partition (and remember not all of them initially did). This rejection has been used to sell Israel's aggressive war as 'defensive' ever since. Ditto the subsequent ones.
But you are not suggesting that those are my words are you?
To be fair, that seems to be what you are saying, so far.
On a serious note try adding a cold study of the irrationality of parties involved, the theological justifications of their acts, the Sunni/Shia rivalry (the main Iranian rival in the region is not Israel but Saudi Arabia), and the humiliation that the very existence of Israel poses to the Arab/Persian self-assertion and you might arrive at a different conclusion.
The parties aren't so irrational. They operate in the same way as other states, with much the same interests. What they say and how they act are often inconsistent with each other. Religion is part of the superstructure of capitalist society, reflected by the way its leaders talk. It serves the interests of the ruling class.
Saudis are an American client lined up behind Israel. The role of Sunni-Shia rivalry is overstated, something that has emerged (conveniently) from certain fault lines, where there is a need to undermine Iran's popularity among Sunni-majority populations, and where it is useful to create division.