Here is our video response to it followed by a lecture explaining how the Sahaba (RA) would react to such blasphemy and the rulings on how we should deal with it. It's long but do take some time out to read it. It's very important. You can either listen to the lecture posted after the video or just read the typed article. It's the same. Though, if you haven't got enough time for that, at least listen to the last 10 minutes of the lecture or read the last 4-5 pages.
The video above may be downloaded from the following sites: