Did AIPAC campaign against the genuinely anti Semitic Mark Robinson?
Of course not, he's pro Israel.
He's also genuinely anti Semitic.
AIPAC could care less. Herzl himself talked often about the need to form alliances with Western antisemites, as many Zionists and many antisemites both want all Jews to go to Israel and prioritize their ethnicity over their ideology. AIPAC is carrying on that legacy, Jews who do not put Israel first are viewed as traitors, non Jews who support Israel are viewed as allies, no matter how much disdain they might have for American Jews who are not ethnonationalists, and no matter how bloodthirsty their reasons for really supporting Israel.