I never realized that Hitler had PD. Even more curious in this article is his character and personality traits that the author associates with PD.

http://www.ncbi.nlm.nih.gov/pubmed/10053222

There is a special show on one of the Science Channels recently.

It demonstrated that the tremor Hitler had coincided with the
methamphetamine shots his person physician was giving him and
may have been due to that drug all along. In fact H was so intoxicated by the methamphetamine, he could not coordinate the military near the end of the war and that is why Germany lost
(fell apart). So while the methamphetamine fueled some bizarre
decisions (Holocaust built upon his paranoia that may have been drug induced), the drug depleted dopamine and led to or exacerbated his tremors and led to him being unable to function any more.

If you can find this show...you'll discover it is very compelling.

I think it was on the History channel... or History II.

It was pretty detailed, and even had evidence the injections were
analyzed chemically. I saw it recently, late at night.

When I surf I don't always recall what channel I end up on, at 2am or such!... sorry.

You might be able to find the show on their website.