and that means putting substantial pressure on Israel. Trying to blame Iran for regional instability is a red-herring.
It wasn't Israel that threatened to push Iran into the sea, it isn't Israel that fires rockets at it's neighbours.
A nuclear device the size of a small car would fit easily into a container, a ship claiming to take supplies to Gaza, intercepted by Israel and taken to an Israeli port where a suicide crew detonate it, mission accomplished?
Usually Israeli intelligence is pretty good and it is likely they get information directly from Iran's nuclear facility. An awful lot of Iranians have never hated the Jews but they certainly hate the current administration. Yes I have lived in Iran.