Let's settle the hash of all this "Arabs are a semitic people too" nonsense, shall we? ~~

'Online Dictionary
an·ti-Sem·ite (nt-smt, nt-)
n.
One who discriminates against or who is hostile toward or prejudiced against Jews.
anti-Se·mitic (-s-mtk) adj.'

Any dictionary will give same definition. Everybody knows that words' meanings develop and alter over time, and that common usage can give them connotations different from, and even at complete variance to, their original derivations. It is disingenuous to base arguments on over-literal definitions based on long-ago meanings that no longer apply. Anyone who argues that antisemitism includes Arabs, or any other demographics other than Jews, is merely trying to muddy the issue without adding a whit to the actual applicative arguments.

And they know it too.

~Michael~