Stealth hiring was the practice that got it started. A homosexual would apply for and receive a position that impacted hiring. From there the hiring would be aimed at hiring and promoting other homosexuals. No pun intended, then there was an end run around qualified people to place homosexuals into positions of greater power and authority.
I first saw this in the early 80s when a homosexual human resourses director called a newly hired well known Christian kid into her office to talk with him about his job duties. They had a nice chat and he went back to work on the shop floor.
That evening he was contacted at home by the plant manager and fired for verbally assaulting the human resources director and threatening her, according to the director.
Eventually the woman was found out but not before she had placed several homosexuals onto the shop floor and into the management offices from which they were promoted and those on the shop floor were promoted to supervisory positions.