It's hard to imagine what could constitute serious opposition to mainstream anti-racism but would also pass muster under your criteria.  PBS and California Newsreel are not scientific organizations either.  However, like AmRen, they have marshalled scientists and opinion writers to help put forward their views.  Ironically, AmRen has often been evaluated with alarm as more dangerous than other groups by anti-racists because of the quality of its writing and its calm and scholarly tone.  In any event, your subjective assesment, heavily influenced by your personal opinions on the subject matter, of whether AmRen's view of race is "worthwhile" or "base" or whether the piece's writing is "high quality" is not sufficient grounds for removal.  You will simply have to tolerate the occasional link to an article you disagree with, even strongly.  I will restore the link soon unless given an convincing reason why not.