I examined the logic in your post
and review it here.

Nick wrote:
"Perhaps I misunderstand you, but I find the idea of Arab propaganda through PBS a bit implausible. "Christian interests" have financially acquired a large part of the developed world, including academic institutions. Does that totally discredit science?"

You dispute a model which you imply I made:
IF Arabs acquiring PBS calls their political coverage into question
THEN do Christian media discredit science?

Algebra substitions:

Imply Mike was saying:
A single ethnic coalition acquires a large media outlet previously somewhat known for its nonpartisanship. Its subsequent nonpartisanship will be called into question.

So, you ask, if we question the current fairness of that media outlet, must we not also
ask if a religious presence in the media in makes science false?

So distill, you say:
Proposition
Ethnocentric...media...credibility..questioned
leads to
Religious... media.. credibility of science harmed
(science being the very process of "questioning")

That does not make sense. The model does not work.
They must call it Ivy league because
its graduates need a transfusion of logic.
(come on, lighten up) :)