There are niches in everything: linux, Windows, Mac, BSD, Solaris. The "priesthood" is an attack on precisely those sectors (denying that they're rational but rather religious, which is itself a whole 'nother kettle o' fish).
>will be a lot af ad hominem attacks on him because he is saying things that people don't want to hear.
And exactly the same thing happens when you attack some other segment's holy cow. Why the hostile flavoring for Linux folks if he is one?