On 4 June 2017, in the wake of terrorist attacks in Manchester and London, Williams wrote an opinion piece for the "Sunday World" entitled "Internment camps are grim necessity", which called for the establishment of internment camps for the detention without trial of "3,000 [Muslim] extremists living in the UK". She acknowledged that internment in Northern Ireland didn't work but that terrorists today could not be negotiated with. Donald Clarke of the Irish Times criticised her views as "illogical, totalitarian and profoundly sinister" and compared them to Breitbart and UKIP. He pointed out that internment in Northern Ireland drove Irish Republicans away from negotiation. He also criticised some response to her column as "predictably patronising, borderline sexist". Williams later said she had made a mistake and apologised for her stance, saying she had written it when she was frightened and angry and that her advocacy of internment was misguided. She also said she had received death threats.