Hi Paula,
Just considering politicians, you can add
* Pierre Trudeau
* Yasser Arafat,
* General Franco.
* George Wallace
* General Patten etc
Then you can find similar lists for actors, sportsmen, musicians, and so on. In "Who's Who", there is a far higher % of PD sufferers than in the population. The only common denominator is being famous, but how does that cause PD?
I don't think there is evidence that stress causes PD, but it certainly exacerbates it. I would think a prisoner on death row for years as some are, would be subject to at least as much stress as a concentration camp inmate. I don't know of a single case where a long term death row inmate has developed PD.
Lurking,
It is difficult enough to get a PD diagnosis even today, let alone 1945. These people were sick from every illness going, rickets, malnutrition, dysentry, etc. The older inmates died more readily, and statistically are the class who more readily get PD. The knowledge of PD was poor, these were pre Sinemet days.