Here's a possible way to square the circle posed by this Politico piece (and others) over touches of seeming antisemitism at Breitbart.
Nonetheless, Bannon’s critics have cited instances of what they call anti-Semitism on Breitbart.com when Bannon was the site’s editor, including a headline calling Weekly Standard editor William Kristol a “renegade Jew” and a column attacking Washington Post columnist Anne Applebaum that conspicuously noted her Jewish identity.
There is a rift between a polite, comfortable-with-modernity, globalist neoconservatism and a gruffer, old-school and more nativist paleocon bloc. Jewish thinkers, including Kristol's dad Irving, were early drivers of neocon thought, so Jewish=Neocon became a anti-neocon meme, as folks critical of their being both more polite and more cosmopolitan used their ethnicity as a ideological marker; a touch of actual anti-Semitism might well be in the mix as well.
The piece noted that there is a strong pro-Israel stance in that Breitbart universe which seems to run counter to the occasional Jew-baiting. In contrast to the Muslim Arabs in the Middle East, Jews are more normal to a nativist's eye; Haredi might get confused for ZZ Top, but at least they're not violently opposed to Western Civ.
Post-9/11 (and arguably post-Shah if not post-1972 Munich), Muslims have become the dreaded Other. Since the Cold War, they've become the enemy of choice. Jews (especially the European-descended ones in the US) are seen as one of Us in comparison, passing on Christmas but otherwise part of the American cultural mix and the successes of Israel has given them a badass allure for many on the right. A tighter definition of Us can exclude them, but fewer people will draw that circle that tight these days.
There is an unhealthy chunk of alt-right thought (and alt-left as well) that cast Jewish-Americans as part of the problem, but in geopolitics, they're a feature rather than a bug for all but the Hitler fanboys.