Anti-Semitism: The logic behind the Word — Is it sound?

"Anti-Semitism" as a term, seems to have become a word too loosely used in the mass media and possibly everyday language, especially in the so-called "West", wherein not much thought is given to the literal lingual basis of the word.

A little bit of historical perspective on this term:

Wilhelm Marr coined the term “anti-Semitism” in 1879 in his The Victory of the Jews over the Germans, which