Brent Bozell cornered one of the big-name editors, I think it was a WaPo editor, and pressed him about why the Dirkhising story didn't play in the guy's paper. His reply, which you can find in Bozell's Media Research Center column archive, was that "It didn't 'resonate'." Which Bozell rightly skewered as "It didn't fit with our Message."
The history of the APAs decision to change its Diagnostic and Statistical Manual (DSM) is worth examining. Homosexual activists used intimidation and deception to force the APA to remove homosexuality as a mental illness from the DSM of psychiatric disorders. For example, in 1970 homosexual activists contacted a prominent and highly-respected member of the APA Board of Trustees, and received a polite letter in return (on his letterhead and bearing his signature), declining to endorse their position. The activists then purchased the APA mailing list, used the letter as a guide to print up the board member's stationery, and forged his signature at the bottom of a letter fully endorsing the homosexual agenda, mailing it to every APA member. (Bayer R. Homosexuality and American Psychiatry: The Politics of Diagnosis. New York: Basic Books, 1981.)
The result was not a conclusion based upon an approximation of the scientific truth as dictated by reason, but was instead an action demanded by the ideological temper of the times. From 1969 to 1971, homosexual activists stormed the annual meetings of the APA, demanding the normalization of homosexual behavior. Scheduling the 1971 annual meeting in San Francisco was an invitation for disaster: homosexual activists invaded the meeting, screaming and kicking, throwing chairs, seizing microphones, and denouncing psychiatry as the enemy incarnate. (Ibid.)