An old report on Iran and Nuclear.
had to go to the wayback machine.
https://web.archive.org/web/20080807165536/http://www.nrdc.org/nuclear/iaea_iran_031110.pdf
So they had HEU from somewhere (likely ours) Maybe that's the angle. Our stolen nuke material given out all over the world. NK, IRAN, Israel. etc.
https://en.wikipedia.org/wiki/Israel%27s_role_in_the_Iran%E2%80%93Iraq_War
Israel's role in the Iran–Iraq War consisted of support provided by Israel to Iran during the Iran–Iraq War from 1980 to 1988. During the war, Israel was one of the main suppliers of military equipment to Iran. Israel also provided military instructors during the war and direct support to Iran's war effort, when it bombed and destroyed Iraq's Osirak nuclear reactor, during Operation Opera. The nuclear reactor was a central component of Iraq's nuclear weapons program.
Israel supported Iran during the war so that Iran could provide a counterweight to Iraq; to re-establish influence in Iran which Israel lost with the overthrow of the shah in 1979, and to create business for the Israeli weapons industry. The Israeli arms sales to Iran also facilitated the unhindered immigration of the Persian Jewish community from Iran to Israel and the United States. Israel's support for Iran during the war was done clandestinely, and Iran publicly denied any cooperation between the two countries.