The hijackers of the September 11 attacks were motivated by a combination of ideological, political, and religious reasons. They were members of the Islamist militant group al-Qaeda, led by Osama bin Laden, who declared jihad against the United States in the 1990s. Key motivations included opposition to U.S. military presence in the Middle East (such as troops in Saudi Arabia), U.S. support for Israel, sanctions against Iraq, and perceived Western aggression and repression against Muslims globally. The hijackers viewed the attacks as retaliation and a means to spread terror by targeting symbolic American landmarks. They also believed in martyrdom, with a mix of personal, religious, and socio-political factors contributing to their willingness to carry out suicide missions by hijacking commercial planes to cause mass destruction and casualties.