9.11について。なぜアメリカ人はアラブ人に対してヘイトクライムを行ったのか？についての文 の意味は？

That was before the attacks of Sept. 11, 2001, when a grieving America desperately tried to understand how anyone could carry out such an assault and found its scapegoat: Muslims, Arabs and anyone who looked like the terrorists responsible for hijacking four U.S. airliners and killing nearly 3,000 people after flying them into the World Trade Center towers and the Pentagon.　　　　を和訳してください！お願いします。