Firstly, bin Laden was deeply influenced by extremist interpretations of Islam that sought to establish a global caliphate. He viewed the United States as the primary obstacle to this goal and saw the attacks on the World Trade Center and Pentagon as necessary steps to weaken the American influence in the Muslim world.
Secondly, bin Laden held strong political objections to the United States' involvement in Middle Eastern affairs, particularly its support for Israel and the presence of American troops in Saudi Arabia. He believed that the United States' actions disrespected Islamic values and violated Muslim sovereignty.
Furthermore, bin Laden had personal reasons for targeting the World Trade Center. In the 1990s, the US had imposed sanctions on bin Laden's construction business in Saudi Arabia, causing him significant financial losses. Additionally, the US military presence in Saudi Arabia, where Mecca and Medina are located, was seen as an affront to bin Laden's religious beliefs.
Overall, the 9/11 attacks were driven by a complex combination of ideological extremism, political opposition, and personal grievances that bin Laden held against the United States and its policies in the Middle East.