He went wrong when he decided to identify with left-wing radicals of the ‘60s and by following their “rules”. However, it is my belief that he did not make that decision on his own free will. He’d been worked over pretty good by that time and because his young mind was weak, he just sort of fell in with them. Knowing that to be the case, they brought him in and then finished him off.
That and instead of growing out of it, he is more deep in it than ever.