Actually, per the guy who had it removed from the DSM (Dr. Nicolas Cummings) it was removed for political reasons.
False. Homosexuality was removed from the DSM by the nomenclature committee and the APA board of trustees.
The APA's Nomenclature Committee went through an 11-month process by preparing a report recommending the change in DSM-II. This process was open to any APA member and in the course of the 11 months 78 different experts were called on to present evidence and research. The committee specifically invited most vocal opponents of the change, Charles Socarides, Irving Bieber, and Robert McDevitt, to present research and evidence. While all three attended meetings they presented no research. Instead they chose to complain how the this was a political move not a scientific one.
At the end of this process the APA's Council on Research and Development unanimously recommended deletion of homosexuality from DSM-II. Next, it was taken to the Assembly of District Branches, where it was again approved. The next step was the APA Reference Committee, composed of the heads of the various APA councils and the president-elect. The Reference Committee endorsed the proposal, leaving the approval of the board of trustees at the December meeting as the final step.
Then the APA Board of Trustees again invited , Charles Socarides, Irving Bieber, and Robert McDevitt, to present their case a third time on December 10, 1973. Bieber restated the old theories without presenting data to support them. Socarides and McDevitt complained that the change in classification was motivated by politics, not by scientific studies. Socarides and McDevitt were asked once again to present scientific studies supporting their view of homosexuality as a pathology. They could not produce any. Following those presentations, the Board of Trustees met in executive session and voted to approve the removal of homosexuality from DSM-II.
and here is where as Dr. Cummings notes politics enters the picture.
Socarides and Bieber found a by-law provision designed to provide some democratic control over the association's corporate life, and then forced a petition demanding a
referendum of the Association's membership.
So the very people accusing the APA of capitulating to politics were the ones playing politics