Well, I thought that video was funny (though they flogged the joke to, err, death), but I also think this Monty Python sketch is funny:
That said, the idea seems more like something that Baldrick would have come up with than Baldrick’s creator, Richard Curtis. Many people aren’t going to find it funny, merely offensive, especially since it’s not in the context of a comedy show. The resulting outrage from right wingers is something to behold, with the makers of the video called fascists and Nazis who are advocating murder and genocide. For example, the reliably crazy Lubos Motl (warning: Link goes to a blog with the ugliest design you are ever likely to see):
However, it was the choice of the 10:10 movement to openly promote genocide. They are not just promoting it: much like in the case of The Fate of the World PC game, they are planning it. They are genuinely planning ways how to reduce the global CO2 emissions by 10% a year. And indeed, genocide similar to what they present in the video (or in the game) is the only plausible way how something of the sort may be achieved.
The CIA, FBI, and others should go after the neck of the inhuman activists behind the 10:10 movement and those who harbor them. These people are a genuine threat not only for your well-being and prosperity but for your freedom and health (or life), too. It is amazing that people such as Gillian Anderson (of X-Files) collaborated to produce this atrocious video. Did someone threaten her with a red button (by the way, would Scully believe that such a thing could work?), or is she really such a disgraceful bloody N-word b-word?
Unless she was blackmailed, I do think she may want to go to jail.
Update: Matt Wootton on where he thinks 10:10 went wrong.