Functionally that’s how ‘neoconservative’ is used.
Properly the word describes former leftists who have become conservatives, especially if they still have a vague nostaligia for some leftist ideas they now recognize to be utterly unworkable. The one really notable person who clearly fits the description ‘neoconservative’ who isn’t Jewish is Michael Novak.
A lot of people fitting that description happen to be Jews, hence the usage of the word among leftists and Buchananites.
And the late Jeanne Kirkpatrick and the late Daniel Patrick Moynihan.