Earlier quoted context omitted.
Aren't Arabs also "semitic people" [1]? (Since Ishmael and Abraham are also descendants of Shem...). In this case "antisemitic" would also mean "against Arabs"... [1] https://en.wikipedia.org/wiki/Semitic_people
Yes, they are also a Semitic group, but "Anti-Semitic" has come to refer to hatred specifically against Israelis. Maybe because that hatred is more widespread than hatred against all Semitic people...?
The fact that Israel is a nation "home for jews" doesn't help, as some people think that every critic against Israel politic is the mark of "anti-semitism" even if religion has nothing to do with. Sometimes it might be the indicator of "anti-sionism" and sometimes... just the indicator of political difference! After all, you can criticize any country for its politic without critizing the counrty "per se"
Moreover, a lot of people in Israel are not jewish but muslims.