Oh well, it isn't the first time scientific findings were suppressed to advance political agenda: see Stalinist Soviet Union, Fascist Germany, Castro's Cuba, Maoist China, etc., etc.
I was in grad school right after the research was published. It did set off a firestorm. I remember the gay activist angry response and their dismay when they found out one of the lead researchers was gay and denounced their activism. The suppression efforts failed and a new avenue of research took off.
A biological disorder cannot be tolerated as the origin of sexuality deviation from the norm, after all. What if a treatment might be developed?
Yep - that is the fear. A treatment means that homosexuality would be reclassified as a disease or a disorder. Treatment would mean that homosexuals would be relegated to less political status than diabetes patients.