Iran's population is seventy million while Iraq's is thirty four million. Many groups of people of ethnic, tribal and sectarian diversification are living in the two countries. Since the occupation of Iraq by the United States; Iran started to occupy the role of a basic player in Iraq's issues through a support from the Shiite sect followers or the majority of them. The said Iranian interference led to separating Iraq from its Arab circumference due to the said powers attempt to create fundamental changes on its land. Syria's crisis and its burning revolution led to Iraq's interference in it as a supporter part to the Syrian regime due to Iranian pressure. Because of the increasing incidents occurring on the Syrian land; Iran has gone farther through sending its Defense Minister Ahmad Wahidi to Iraq with a joint defense agreement between Iran & Iraq in his hands. Iraqi people view in regard to this agreement has been uneven or different. The Iraqi authority believes that it is positive for retrieval of Iraq's security and fighting terrorism while the opposing party believes that it constitutes a dependence on Iran and a penetration to their country's security in spite of its capacity and capabilities to maintain stability as they consider that their country should avoid alliances and suspicious agreements. Syria constitutes a strategic concern for Iran which estimation believes that Al-Assad's authority is going to be ended. To Iran, this means losing the most important ally who has been controlling an important area and leads them to adopting Iraq as an objective alternative. What does signing such a treaty mean in regard to Arabian Gulf countries security, especially if we consider that Iran is not hiding its greedy ambitions in them and its challenge to the Arab existence as a whole? Adding Iraq to its reign or power means a closed neighborhood, especially in the era of the present government which has worn the Syrian regime support gown, in spite of its previous suffer from Al-Assad's regime and its support to the Baathists and Al-Qaeda. However, while being with Iran, the sectarian union has become a barrier or a bulwark against the big Sunni circumference which are surrounding them from all directions. The United States imposed on Iraq that it shouldn't be a crossing bridge for the Iranian arms and volunteers for supporting Al-Assad. After the American Threat, Iraq started responding to it through inspecting an Iranian airplane that has crossed its airspace. However, the American did not fight in Iraq and occupy it for leaving with no gains at the end. If the United States is within a condition of dispute with Iran as it is still practicing its economic, psychological & electronic war against it; will it accept such agreement by which it shall be neighboring Iran inside Iraq in spite of its effort for establishing a bigger military presence in Iraq in the future? The general appearance implies that each of Iraq and Iran is maneuvering the United States for gaining certain roles and these roles are not in Syria only but in the Arabian Gulf, as well. At the same time, they claim that the end of the Syrian regime will be an extremist Sunni Islamic authority that may cause fundamental change in the circumference around Syria where Al-Qaeda & others may start a long-term hostility with the United States itself! Such fears are known by the United States which preserves its estimations in regard to the whole Arab changes but what results shall this agreement have on the condition inside Iraq? We know that the security condition is miserable and that Al-Maliki cannot patch the occurring splits through bribes and internal allies. The presence of Iran inside the Iraqi tissue means a presence of a rejected body that Iraqis shall resist. In such a case, the split may develop towards becoming a security crisis that may lead to dividing Iraq itself, especially if we consider that the present Iraq is ready for all bad possibilities through its government which is talking about such division in public.