Hahah, no, no more than apartheid South Africa or the South under Jim Crow.
they are allowed to posses such weapons.
They are non-signatories of the NPT, one of only four countries in the world that hold that distinction, and have ignored calls by the IAEA to open its nuclear facilities to inspection and comply with the non-proliferation treaty, making its record even worse than Iran's.
On top of that look at all the nuts they are surrounded by.
Iran is surrounded on two sides by countries occupied by a country who has recently pursued a foreign policy of regime change and called Iran a member of the "Axis of Evil," was attacked by American-funded Iraq in the 1980s, and has a hostile state just a few hundred miles away with a nuclear arsenal. Surely if Israel is allowed nuclear weapons for defense, so too should Iran.