According to the article, Hinton stayed a supporter of the regime through the murders and lynch mobs of the cultural revolution, although
... he was deeply disillusioned by the Tiananmen Square massacre in 1989, which he observed on the spot, driving through the suburbs of Beijing to check on the advance of the army. His daughter by his first marriage, Carmelita Hinton, born and educated in China, later co-produced The Gate Of Heavenly Peace (1996) - a challenging film about the massacre.
The writer of the article, John Gittings, was The Guardian's China correspondent for years and has written several interesting books about China, including:
The Role of the Chinese Army Gittings, John, 1981 Greenwood Press,London
and Real China Gittings, John, 1996 Simon & Schuster