This is basically the (slightly) more civilized version of all this violence we've seen over the Danish cartoons.
You want to act out and to do so on national TV, cause, hey, it's Dawkins ... big press, so you go looking for something to take offence at.
And there's not really anything there. So, like with the Danish cartoon you make stuff up and take offence at that.
... and if the UN blasphemy law ever becomes reality, it even becomes illegal to say this rabbi fellow is wrong.