The protesters who carried placards which demanded an end to threats and sanctions against Iran, opposed their country's backing for the West's hostile attitude towards Tehran.
Jim Rash, a protestor, pointed to the US meddling in Afghanistan and the killing of the Pakistani people in its drone attacks, and said, "They (the West) are trying to focus on the Middle East again and target Iran this time. The US regards Iran as an arch foe which should be kept under its control."
"The West seeks another war against Iran and uses Tehran's nuclear program as a pretext, although many experts believe that Iran is not after nuclear weapons," the protestor added.
The marchers also issued a statement at the end of the gathering, calling on the Irish government to condemn the tough sanctions and threats against Iran.
The statement reiterated that no evidence has ever been found on the diversion of Iran's nuclear program towards military goals, and said "military threats and sanctions" against Iran, thus, run counter to the UN charter.
The United States has always stressed that military action is a main option for the White House to deter Iran's progress in the field of nuclear technology.
Washington and its Western allies accuse Iran of trying to develop nuclear weapons under the cover of a civilian nuclear program, while they have never presented any corroborative evidence to substantiate their allegations. Iran denies the charges and insists that its nuclear program is for peaceful purposes only.
Despite the rules enshrined in the Non-Proliferation Treaty (NPT) entitling every member state, including Iran, to the right of uranium enrichment, Tehran is now under four rounds of UN Security Council sanctions for turning down West's calls to give up its right of uranium enrichment.
Tehran has dismissed the West's demand as politically tainted and illogical, stressing that sanctions and pressures merely consolidate Iranians' national resolve to continue the path.
Political observers believe that the United States has remained at loggerheads with Iran mainly over the independent and home-grown nature of Tehran's nuclear technology, which gives the Islamic Republic the potential to turn into a world power and a role model for the other third-world countries.