DennisW: there is no need to insult Stormer and call him names simply because he expressed doubt. He said nothing offensive and did not deserve your harsh treatment.
Stormer: the word anti-Semite does NOT have any scientific connotation. Starting with 1860s, the "Jewish question" gained in importance in Germany, where Jews not only lacked equality but even citizenship. There were great debates in the press at the time. During one of those, a journalist invented the word "anti-Semite" to designate bigots hating the Jews. Contrary to the way it sounds, it is NOT an opposite to "Semite," which is a scientific term denoting a group of people.
Thus, to be a Semite is to belong to the Semitic group (which indeed includes Arabs), but to be an anti-Semite is to be against Jews only, and not other members of the Semitic group.
Thank you for your thoughtful and informative response - you’ve answered my question. I know language is imperfect, and I appreciate hearing from those who recognize and are able to explain the shortcomings evident in its use.