Actually, it originally came from Sub-Saharan Africa where it spread among heterosexuals. Also, one of the first people to be infected in California was an intra-venous drug abusing female prostitute. She infected several of her male clients and her husband.
However, AIDS did pass to heterosexuals through bisexuals, IV drug users and contaminated blood products, it also got into the US heterosexual population through heterosexuals who came from Haiti and Africa. American heterosexuals also contracted it abroad. Thus even if homosexuals had not had a high incidence of AIDS then it would still have got into the heterosexual population in the USA.
Stavka is wrong because AIDS first got into Russia in the early 1980s and it was brought in by a heterosexual Russian man who contracted it while he was working in the Congo in 1981. He infected his wife, who in turn infected their unborn child. At the Elista hospital syringes were used to take blood from the baby and they were then re-used on other patients, thus spreading the virus to other babies and their mothers.
Valentin Pokrovsky a Russian retrovirologist personally confirmed the child had AIDS. In the USSR the average syringe was used 100 times, often without adequate sterilisation. The baby was moved to another hospital in Volgograd where the same reuse of contaminated syringes caused more patients to become infected. This story was made public in the Russian trade union newspaper 'Trud' in 1989. Read about the incident on pages 500-501 of Laurie Garrett's 'The Coming Plague'.
Once the virus got into the heterosexual community then it could spread because people did not know they had it and did not use condoms.