One nuclear bomb...which Iran does not have.
Iran enriches to 60%, which is insufficient for military purposes, but is used for radio pharmaceuticals. Iran has a significant nuclear medical sector and supplies much of the middle east with medical isotopes for cancer diagnosis and treatment.
Iran does not want the total destruction of Jews, it has a large and vibrant Jewish community, including representation in parliament with a seat specifically reserved for representation of their Jewish community.
We do know what equipment Iran has and what stage their capability is at because Iran is a member of the IAEA and has regular inspections.
We also know that Israel has nuclear weapons, through the NUMIC theft of highly enriched uranium, satellite imagery of their Dimona facility and whistleblower leaks from employees there. We also know that they have the doctrine of "The Samson Option" of nuclear annihilation in the face of existential threat.
What we dont know, because Israel does not allow inspections and is not a member of the IAEA) is how many nuclear weapons Israel has, or what their payloads are. (Estimates range from 80-400 warheads, including Jericho III, which has a potential range of 6.5k km.)
The deaths of nuclear scientists (note that 40% of nuclear scientists in Iran are women btw!), is yet another war crime, to add to the many, many, MANY war crimes that Israel has committed just this year harms cancer patients far more than it harms a hypothetical, non-existent weapons programme. On the one hand you are celebrating the precision deaths of scientists....then on the other you are claiming that Israel does not target civilians.
Incidentally, London is rumoured to be on the Samson option list (with a 200-400kt payload). We know Israel has nukes, we know their range reaches London, we know that they have an official policy of nuclear annihilation in the face of existential threat, we know they have no regard for international law, we know that the country is headed up by a war criminal and we know that they are willing to kill millions of people.
You better be very confident that you have picked the right side here, cos you sure as fuck dont want to be living through a Threads rerun.