Answer:
The source of Al-Qaeda's hostility towards the West were:
Involvement in Middle Eastern affairs
Step-by-step explanation:
Al-Qaeda is a military organization created by Osama Bin Laden and Abdulla Azzam among others. That executes terrorism in different nations of the world. However, it has been back by a few governments to execute unofficial operations to influence the geopolitical events in the middle east. Making the involvement of the West the reason for Al-Qaeda's hostilities to them.