I'm still nut sure about the veracity of this letter -
as advised, the informal salutation is simply not the way schools write to parents.
I would also doubt that any head teacher of any school is unaware of the dangers of portraying the Prophet, in view of the actions taken when it has occurred.
And finally, I very much doubt that any school would come down hard on a cartoon character lunch-box carried by a little girl. Children love bright cartoon images on things like lunch boxes - one of my grandsons things his Minions lunch box is the Eighth Wonder.
No, I think it's a spoof - and just because the media report it doesn't make it true - Hitler's Diaries anyone?