Blinky's animosity comes from the fact that Barnes is of a neocon philosophy. The neocon movement came from former communists that saw the light. Many of them were of a certain genetic persuasion (although Barnes is, I'm pretty sure, not). Can you guess what genetic persuasion that is?
This is why you'll see the occasional post using "neocon" as a perjurative.
As far as pundits who are converts to conservatism are concerned, some of them are among the brightest and most persuasive advocates we have. David Horowitz is an example of someone who was born into the belly of the beast, knows every trick in their book, and can expose every lie behind their agenda.
Fred Barnes is not even close to being as good a writer as Horowitz, but this article is not bad and does bludgeon its way to the point