Having read the opinion linked to this thread, and having read of other anti-Arab occurances, I cannot help but wonder about our future. Sure, we are stunned; we are hurt; we are angry...but we must direct those emotions against the actual perpetrators of the evil acts of the 11th. Innocent individuals must be left alone to live their lives.
That said, the title of this thread is misleading and falacious. "Anti-Semitism" refers specifically and solely to "Anti-Jewish". It is a term first used in 19th century Germany as a euphemism for that particular hatred. While it is true that Arabs are a Semitic people, they were not targeted like Jews for many reasons. There are many studies on Anti-Semitism for those who are interested. I commend them to you.