antisemitism is used to refer to Jewish people, though it is really being used incorrectly.
The present meaning as well as the original meaning when it was coined was referring to Jewish people, even if it doesn’t align with its etymology. So using it to name hate against Jewish people is correct.
That also implies that using antisemitism to name hate against Arabic would be incorrect. Though you may try to redefine the term, write a couple of articles and books and maybe in 50 years it will be considered correct usage.