Iran was the first country to bomb a nuclear reactor.
Iranian attack
Iran attacked and damaged the site on September 30, 1980, with two F-4 Phantoms, shortly after the outbreak of the Iran-Iraq War.[45] At the onset of the war, Yehoshua Saguy, director of the Israeli Military Intelligence Directorate, publicly urged the Iranians to bomb the reactor.[45][46] This was the first attack on a nuclear reactor and only the third on a nuclear facility in the history of the world. It was also the first instance of a preventive attack on a nuclear reactor which aimed to forestall the development of a nuclear weapon, though it did not achieve its objective as France later repaired the reactor.[17][46][47]
Trita Parsi, in the book Treacherous Alliance: The Secret Dealings of Israel, Iran, and the United States, writes that a senior Israeli official met with a representative of the Khomeini regime in France one month prior to the Israeli attack.[48] The source of the assertion is Ari Ben-Menashe, a former Israeli government employee. At the alleged meeting, the Iranians explained details of their 1980 attack on the site, and agreed to let Israeli planes land at an Iranian airfield in Tabriz in the case of an emergency.[48]
Head of the International Atomic Energy Agency (1981-1997)
Blix became Director General of the International Atomic Energy Agency between 1981 and 1997 after Sigvard Eklund.
Blix personally made repeated inspection visits to the Iraqi nuclear reactor Osiraq before its attempted destruction by the Iranians, in 1980, and its eventual destruction by the Israeli Air Force in 1981 during Operation Opera. Although most agreed that Iraq was years away from being able to build a nuclear weapon, the Iranians and the Israelis felt any raid must occur well before nuclear fuel was loaded to prevent nuclear fallout. The attack was regarded as being in breach of the United Nations Charter (S/RES/487) and international law and was widely condemned. Iraq was alternately praised and admonished by the IAEA for its cooperation and lack thereof. It was only after the first Gulf War that the full extent of Iraq's nuclear programs, which had switched from a plutonium based weapon design to a highly enriched uranium design after the destruction of Osiraq, became known.
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It isn't just an issue of how small the thing is.
It also isn't an issue of someone saying they're were "able" to do something.
We were able to do it decades ago... but didn't.
You've found lots of sites talking about Israel's nuclear capability... can you find one that says they ever tried to make a ground-penetrating nuke? Anyone speculating that they have one? You can't just say "they have nukes" and "they could make a small one"... you have to have a reason to believe that they produced this specific type.
The only sites I've ever seen with such speculation were the l-fringe types (aliens, "west coast uninhabitable from Fukushima", chemtrail, etc). One even speculated that the explosion in Fukushima unit 3 was a nuclear bunker buster. Did you know that Israel caused the tsunami in Japan with a deep sea nuclear explosion to punish them for supporting Iran? I sure didn't. 
Illustrates problem with relying on other people's eyes for such details. Touche. 
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Operation Opera - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Operation_OperaCached - Similar
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On June 7, 1981, a flight of Israeli Air Force F-16A fighter aircraft, with an escort of ... the Osirak reactor that was bombed by Israel in June of 1981 was explicitly ... the bombing of the Iraqi Osirak reactor delayed Iraq's nuclear bomb program.
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