Just because someone doesn't constantly wave an Israeli flag like the neo-cons do doesn't make them an anti-semite, Bannon's definitely very conservative and right wing but I don't think he's an anti-semite. He's certainly not a neo-nazi either, he personally hired a 2nd generation immigrant from a muslim family (Raheem Kassam) as editor of Breitbart London and he was happy to work for Trump who is also incredibly pro-Israel. He's also happy to have a Jerusalem branch of Breitbart which is consistently very pro-Israel and pro-Judaism. If Bannon's a neo-nazi he's a comically bad one.