(1. Shahab missiles armed with either conventional or C/B warheads)
Israel utilizes both the Arrow and Patriot anti-missile systems. Israel is also ringed with the newest and most sophisticated X-band radar detectors. Israel also has Jericho ICBMs which can accomodate any warhead and easily reach any target in Iran. Israeli subs have cruise missile (SLCM) capability.
(2. Tactical missile attacks on Israel by Iran proxies Hamas/Hizb'Allah)
The destruction visited upon both Gaza and Lebanon for previous missile attacks on Israel was horrific. It's possible, but the price extracted upon the host is very prohibitive.
(3. Asymmetrical attacks on Israeli/Jewish structures and civilians around the globe)
Terrorist attacks, probably on soft targets such as synagogue's etc. Besides intelligence harvesting and vigilence, there is no foolproof method available to thwart such tactics.
אשכנזי היהודי • Белый Россию
Iran's leadership has a healthy (or unhealthy) belief in the return of the long deceased Mahdi. Going up in flames would help fulfill that fantasy.
Surely you know this by now, Dan.