It has been my experience that every single person I've known who used the word "NeoCon" also happened to have a major problem with Jooos. None of them ever offered a rational argument over policy differences, but every one of them expressed a bitter dislike for those "NeoCons." I don't presume to judge people I've never met, but it's been 100% in my personal experience.
As for your phrase "rational argument over policy differences", that would depend on how you lean. If you are a NeoCon, other doctrines or policies are not rational.
For example, I think that Bob Gates, Henry Kissinger, James Baker, and other foreign policy Realists made a much better argument to not intervene in Libya but the NeoCon Republicans and Liberal Interventionist Democrats carried the argument and and Obama intervened. This doesn't mean Gates, Kissinger, and Baker are antisemitic, although they have been called that. Especially Kissinger since he is a Jew..
Which brings you to the next issue. In the USA there are many, many, many more Jews that aren't NeoCons than there are Jews that are NeoCons. When Non-NeoCon Jews criticize NeoCons, they are always called self-loathing or self-hating Jews by the NeoCons.
A case in point is their use of the term 'neo-conservative.' Whether they choose to hyphenate the label or not, it's a pejorative code word for 'Jews.'
Anti-Semites Use "Neo-Con" Code Word, By Rush Limbaugh
Rushlimbaugh.com, April 22, 2003