…at the heart of the argument in CofC is the idea that these movements did not stand or fall on the power of their ideas but rather on ethnic networking (summarized in Chap.6, p. 215ff and especially 222-228). For example, the success of psychoanalysis and the Frankfurt School was not due simply to the intelligence of Freud and Adorno and even less to the (non-existent in the case of psychoanalysis, or fraudulent in the case of the Frankfurt School) data. Their success derived from the group structure of these movements, which centrally involved their co-ethnics, and their ability to gain a foothold in the elite academic world and in the major publishing houses and media outlets, and their ability to ignore or expel dissenters. These movements were like religious cults centered around charismatic leaders (228-230). These movements would never have managed to be successful and influential in a purely individualist scientific culture (pp.234-236). (link)
I agree with MacDonald on this point (and many others). I also believe it is quite easy to see and understand the methods and results of Jewish ethnic nepotism, or ethnic networking.