Quite a good film.
I first saw it as a kid or early teenager in the early 1960s and have seen it several times since.
The film is the sum of my knowledge about von Werra, but the comment about him being a bit snobbish is interesting as Hardy Kruger came across that way in the film.
It’s often the case that people who do extraordinary things in demanding occupations (such as fighter pilots, racing car drivers, surgeons, and barristers) have a large ego. Without it, many of them wouldn’t achieve what they do.