Living in the deep south I can tell you with no uncertainty that this exists. I have met actual neo-Nazis, not those the corporate media claim to be neo-Nazis, but the real deal. They are very much pro-Israel but antisemitic. They are also very pro-Christian but anti-Catholicism. They are very much in the minority, but they do in fact exist, at least to the anecdotal evidence I can provide.
I believe it exists, even where I live.

One of the last fist fights I got it was because some guy wanted a girl I wasn't even dating but like me. He kept provoking me, trying to start a fight, but I refused to entertain him. Next thing I know, I'm coming to, face down on the concrete with a big dude with a huge swastika neckerchief grinning down at me. He had clearly been the one who knocked me down. I don't know how, but I was able to leave without any other trouble other than being refused to grab my sliders (which apparently came off when I got knocked down), but I do remember being absolutely terrified when I left.
Sounds more like an ambush than a fight.

Edit - After rereading your post, I might have misunderstood what you meant by "it's not a subject that gets talked about much". Was it the outsized leverage that groups like the AIPAC have or those who are pro-Israel but antisemitic?
Well, my statement was pretty vague. In Central California we have plenty of other minorities to talk about. The Jewish population here is so small most people don't pay it much attention. I just looked and there's an estimated 10 to 15K in a population of over 6.5million. Southern California has a higher density.