Israel can only be destroyed with missiles. Or biological warfare. There isn’t a conventional army that can breach Israel’s borders without Israel having knowing.
Question for the Palestimians. When Iran launches its WMD at Israel, are you cool with having your race wiped out as well? Because at that point, while Israelis are hunkered down, you will be left out in the open.
Unintended consequence.
a total annihilation for the muslim world is not something iran really wants.
Don't you mean "If Israel could be destroyed, it would be with missiles or biological warfare only". Don't forget that "He who keeps Israel shall neither slumber nor sleep" (Ps 121:4).
I recall in the first gulf war the palestinians cheering Sadaam, till they realized some of the scuds fell short. Naturally they blamed Israel for not providing them gas masks. Fortunately not needed. A nuke could land on Amann as easily as Tel Aviv.