I should look at the actions of American Psychiatric Assocation (APA) (1).
Although American homosexuals today are still struggling for equal
rights, no shift has been more drastically beneficial for the status
of homosexuality than its declassification as a mental illness. The
American Psychiatric Association’s Board of Trustees passed this
groundbreaking decision unanimously on December 15, 1973, and
subsequently released a statement that rejected legal discrimination
on the basis of sexual orientation. In the publication of its
monumental decision to remove homosexuality from the Diagnostic and
Statistical Manual of Mental Disorders (DSM), the board cited “review
of evidence[,]...changing social norms and growing gay-rights
And indeed, Medicine has a dark history when homosexuality was regarded as mental illness.
Classification of diseases as adopted by the Massachusetts General Hospital (1919)
In the military medicine in the year 1949 homosexuality was classified under "psychopathy".
A "modern" perspective in 1968 was to consider pedophilia as a subtype of homosexuality.
Another "modern" perspective in 1971 considered LSD as a "treatment" for homosexuality.
So, yes, things were slightly different back in the days.