Madsen was referring to the latest US allegation that Iran was involved in the September 11, 2001 attacks on New York and Washington.
On December 22, a US federal judge in Manhattan alleged that Iran, together with the Taliban and al-Qaeda, had been involved in the 9/11 attacks.
The court, meanwhile, withdrew Saudi Arabia’s name from the 10-year-old case, even though 15 of the 19 attackers were Saudi nationals.
Tehran has condemned Washington’s allegations as amateurish and baseless scenarios.
Iranian Foreign Ministry Spokesman Ramin Mehmanparast said that the US is jeopardizing international peace and security by repeating such groundless claims.
He added that the US role in founding the al-Qaeda and supporting it is common knowledge.
The American journalist concluded that Iran is now facing an undeclared war being waged by the West and Israel.
"It is a war of computer viruses like the Israeli-developed Stuxnet, propaganda, support for armed insurgents, covert assassinations and sabotage, and political pressure against Iran’s friends around the world. This softening up of Iran is expected by the West to make a final military assault on the country a cake walk. "