Sure, they are radical collectivists, anti-human rights, Nazi-loving, fundamental Islamic nutburgers who wouldn’t mind seeing the world on fire as long as it gets rid of all the icky Jews and Christians … but we can trust them, right?

VIENNA (AP) — Iran will be allowed to use its own inspectors to investigate a site it has been accused of using to develop nuclear arms, operating under a secret agreement with the U.N. agency that normally carries out such work, according to a document seen by The Associated Press.

The revelation on Wednesday newly riled Republican lawmakers in the U.S. who have been severely critical of a broader agreement to limit Iran’s future nuclear programs, signed by the Obama administration, Iran and five world powers in July. Those critics have complained that the wider deal is unwisely built on trust of the Iranians, while the administration has insisted it depends on reliable inspections.

“International inspections should be done by international inspectors. Period. The standard of ‘anywhere, anytime’ inspections – so critical to a viable agreement – has dropped to ‘when Iran wants, where Iran wants, on Iran’s terms,'” said U.S. House Foreign Affairs Committee Chairman Ed Royce in a reaction typical of opponents of the broader deal. […]

The newly disclosed side agreement, for an investigation of the Parchin nuclear site by the U.N.’s International Atomic Energy Agency, is linked to persistent allegations that Iran has worked on atomic weapons. That investigation is part of the overarching nuclear-limits deal. […]

The agreement in question diverges from normal procedures by allowing Tehran to employ its own experts and equipment in the search for evidence of activities it has consistently denied — trying to develop nuclear weapons.

Olli Heinonen, who was in charge of the Iran probe as deputy IAEA director general from 2005 to 2010, said he could think of no similar concession with any other country.

The White House has repeatedly denied claims of a secret side deal favorable to Tehran. IAEA chief Yukiya Amano told Republican senators last week that he was obligated to keep the document confidential.

Iran has refused access to Parchin for years and has denied any interest in — or work on — nuclear weapons. Based on U.S., Israeli and other intelligence and its own research, the IAEA suspects that the Islamic Republic may have experimented with high-explosive detonators for nuclear arms.