I genuinely meant this.

Better wording might be "I think his work is worthy of a Nobel Peace Prize", to avoid the impression of sarcasm ?

In what possible way could his work fit the guidelines for awarding the prize, as described in the will of Alfred Nobel?

This is exactly it. I have been trying to tell people that the Nobel Peace Prize is not the "Awesome Person" prize. Nobel was very clear on what a person had to have been working on before receiving the prize.

In the words of Alfred Nobel: "the person who shall have done the most or the best work for fraternity between nations, for the abolition or reduction of standing armies and for the holding and promotion of peace congresses". [1]

Apparently, for some strange reason, someone nominated Adolf Hitler, too. Now I learned at least something today.

[1] http://nobelprize.org/nobel_prizes/peace/shortfacts.html

The right livelihood award is such a prize, though.

The majority of people who received the Nobel Peace Prize did fuck-all for world peace (e.g. Yassar Arrafat - a terrorist, Henry Kissinger, Barrack Obama - fighting two wars and starting a new one in Pakistan, Al Gore - he made a movie, etc...).

Al Gore and Barrack Obama received their prizes for "not being George Bush". That is about it. The Nobel Peace Prize is useless bullshit (as is the Nobel Prize in Literature).

The majority of laureates did quite a lot for peace. You're picking the controversial outliers and passing them off as the general case.