I don't know enough about that incident. Maybe the guy had white nationalist leanings. WNs usually dislike all Jews. The one that they do "tolerate" are the ones that are strongly anti-Zionist, like Noam Chomsky, Norman Finkelstein , or Neturei Karta (an anti-Zionist Hasidic Jewish group). If you could find the link about the story, that would be much appreciated