I first heard about Kincora from an Irishman in the 1990's. He had been quietly placed there due to his mother not being married in the 1960's. During that period it was considered taboo/shameful for a young girl to have a child unmarried.
What he described was unimaginable. Those kids had no one. They were physically and sexually abused daily. Colin Wallace exposed them. Those perpetrators were not just the monks who ran the place, but also powerful people. The journalist Paul Foot later wrote a well researched book on this very subject " Who framed Colin Wallace"