He is saying something completely false, not something I disagree with. There is nothing to back it up. It is downright insulting.
This might actually be a very good discussion for all involved! Read on....
So what then should be done? Should saying anything that you believe to be false be a crime punishable by a fine? by Imprisonment? By Beheading?
You.....do see what is wrong with this line of reasoning, right? Hard to have a dictatorship when people are freely allowed to express themselves. Without that right, its a lot easier....
Now it is true that freedom of speech is not absolute; we have laws against slander/libel at state and (I think) federal levels (although anyone more learned on this than me feel free to chime in). That said, those laws allow for 'fair comment' which is a pretty broad term. In particular, there usually needs to be proof of 'vicious intent' or something along those lines to argue a slander case when a public figure is in question (at least I think that's how it is in California). The other aspect is that a person who believes him/herself to be slandered can bring a case against the suspect in court but must be alive to make the case. If Mohammed feels wronged, he is permitted by law to resurrect himself (or through god's will, etc) and bring the case to court himself. However, this has not yet happened; until it does there is no legal proof that he has been slandered.
There is another thing here I wanted to touch on which is your claim of feeling insulted. Why do you feel insulted? Let me explain my question. If you search through the net (see the picture in my last post you were quoting, for example, or many others in the darker corners of the internet...) you can see all kinds of terrible, vile stuff, but I don't personally feel insulted by any of it. It may be vile and nasty etc in a general sense but I myself don't feel wronged in life because someone drew a silly picture (or made a movie....). So, why do you? If you hear Jack say that Mohammed was x,y,z, and you know this is false, why does it insult you? Shouldn't you instead think that Jack is a moron and move on with your life instead of thinking OMG YOU ARE INSULTING ME!!!!!!! which is what seems to be going on in these protests?
Essentially, the argument I am making here is that while the video itself might be offensive in a general term, you gotta make the choice for yourself to find it insulting on a personal level. I guess this is a good way to keep yourself from questioning your beliefs (great defense mechanism for a religion) but is a poor choice from a logical standpoint (I disagree, so I will ban you from saying it -- and yes, this is your position, no matter how hard you try to talk around it).
Edit: The correct response to bad speech, of course, is good speech -- not a ban, and not violence.