heretohelp,
I don’t know what you are referring to in your first example, but Dr. Spitzer was always an advocate for the homosexual community (he was one of the people instrumental in getting it removed from the DSM).
In the 2000s Spitzer sought to study whether it was possible for some highly motivated individuals to change their orientation. He published a study concluding that it was possible but probably very rare. He was hit with a storm of criticism from both colleagues and the gay community (who felt Spitzer had betrayed them).
In 2012 Spitzer recanted the study on the grounds that the subjects were all self-reporting and there was no way for him to know if they were deceiving themselves or outright lying.
However, neither Spitzer nor anyone else has ever demonstrated that people cannot change sexual orientation. Rather they say that “reparative therapy” has never been demonstrated to work.