The events of September 11th are considered one of the distinguishing signs of the twentieth century, and it shocked both Americans and the entire world, and had repercussions that lasted for decades, and left its impact on the conditions of Muslims in the United States itself and in the world in general, and made Americans wonder why Muslims hate them. And the American institutions, concerned with measuring public opinion, prompted to conduct surveys to find out the extent of the change in the volume of Americans’ interest and their knowledge of Islam after the September events, and its impact on the perception of Islam and Muslims.