issue of the film is this -
the notion that freedom of speech has precedence over freedom from speech. this proposition is arguable.
it is a choice to presume the former. not everyone makes this choice.
for instance, the us abridges this choice for certain sorts of speech. it doesn't permit the distribution of pornography about minors. it doesn't permit the distribution of information protected by copyright. the government demands freedom from this kind of speech.
i am not sure there is anything more than a prejudice involved in the question of whether you protect religion using the same principle. some countries seem very sensitive to this question. it isn't their tradition to permit insults to their religion.