Really, Germany?

[Excited Penguin]

Yes, but it does not lessen guilt of perpetrators. 

Yes, it does in fact. If you understand why someone is doing what they're doing you become better equipped to handle it and prevent it from happening again, and that's all that matters. Guilt is irrelevant.

Obviously it isn't fault of people born long after. But if not Germans (and other nations too) then who is responsible for Shoah? History itself? Spirit of the times?

Not all Germans were guilty of killing or being accessory to it, yes. But indifference which was more widespread than hate also don't absolve of guilt. Here I'm in agreement with Ian Kershaw and his words: The road to Auschwitz was built by hate, but paved with indifference.

There are a lot of factors involved, including basic human nature, as I pointed out earlier, and charismatic leaders to take advantage of it. It's a very complex issue. But blaming everyone for what happened is simply idiotic and will get you nowhere even if you were right about looking at it like that, which you're not.

It's more about justice and accountability than law itself I would say. I kinda think that man in question should be persecuted, but if he really has dementia then there is no point in doing this I would say.

That is what law means, essentially. You would have to be more of an expert on law precisely to understand how and why such decisions are made. Presumably they're not entirely irrational, no matter the outcome. You can have your uninformed opinion on the matter, of course, but that's all it is. Don't try and add more credibility to it when there is none to be had. It's not as clear-cut as that.