Iran is not goverened by a rationally thinking governement but rather by a group governed by the thought that the big satan and the litle satan must be destroyed no matter what the cost will be.
Most likely, they are more interested in hitting the US than Israel or Europe.
If not checked, they will be able, quite soon, to hit NY from a small submarine, from a distance of 2000 Miles.
Whether exploded or not, a small nuclear attack on NY, or even a 40 pound enriched Uranium wapor from a small conventional missile or bom in a containes in the NY harbor, will force the US to evacuate NY for the next 2000 years.
This will destroy the entire economy of the US and probably the world.
So if you are into such a risc, and hope that someone else will get hit, sleep well.
The conventional missile/bom spreading highly enriched uranium or plutonium vapor is today the single most dangerous thing that could happen to the US and the one threat that is costing the US billions each year to try and prevent.
Nobody mentions it, it can cause a huge panic.
The same discussion took place before Israel destroyed Osirak.
This time, it is not an Israeli problem. It is more a US problem.
In addition, Israel has a very large arsenal of self developed Arrow missiles nobody else has, that can stop very fast, balistic missiles at 50 to 150 miles distance. The US is too vast to defend and is in a far greater danger.
It has a very weak president who does not dare to stand up to the occasion and defend the country.