Demographics of Iraq
97% of Iraqis follow Islam: 61% Shia and 34% Sunni. 1% of these describe themselves as "Just a Muslim". According to the CIA Factbook, Shias make up 60% of population, while Sunnis 35%. Christianity accounts for 5%, and the rest practice Mandaeism, Yazidism and other religions.
2005 Erbil bombing
Ansar al-Sunna stands for Supporters of Islam. "They are an militant Islamic Kurdish separatist movement seeking to transform Iraq into an Islamic state". This group has a Salafist worldview, which means that they insist on a puritanical form of Islam and they seek to emulate the practices of Muhammad. This movement was founded in 2001 by Mullah Krekarand they got financial and logistical help from al-Qaeda and Osama Bin laden. Some of the members of this organization transport money from Germany to northern Iraq to help finance the group.  "This group targets secular Iraqi Kurds-particularly members of the Patriotic Union of Kurdistan (PUK)".  Ansar was named a Foreign Terrorist Organization (FTO) by the U.S. Department of State on March 22, 2004. They are considered an active terrorist group in northern and central Iraq today. Ansar al-Islam operates primarily in northern and central Iraq and claims the second largest number of Sunni jihadist attacks in Iraq after Al-Qaeda. This organization is also known to behead their captives. The goal of Ansar-al Sunna is to have an Islamic country where its people are strong. There are a maximum of two thousand "hard fighters" in Ansar-al-Sunna. This group is the main threat in Northern Iraq right now. This group will most likely continue to attack the Kurds until the country has reached a decision on the position of the Kurds.