I think I've covered the Wahhabi philosophy of destroying heritage before, even anything associated with the Prophet Mohammed. This is in case they become idols, and in some ways is a little like other religious prohibitions that add layer and layer to the original intent to the point where is is distorted.
ISIS is currently misinterpreting it by assuming they know better what the Prophet Mohammed wanted than the people who knew him and recorded his teachings.
Saudi is a little better, but the Wahhabi culture they exported is directly responsible for the various fundamentalist groups claiming the AQ and now the ISIS philosophy. For some reason journalists often call those in north Africa Salafi and seem to be unaware that this is just another name for Wahhabi.
The Saudis funded the more extreme members to go proselytise, many went to Mauretania, and then north into "Western Sahara" and into Algeria. Then Libya ... where we call them Salafis. It's why I could never espouse the trendy cause of Independence for Western Sahara that pop stars and celebutards seem to embrace. If you can't see on this map what a mess that makes it, please don't ask me to sponsor your fundraising for either them or your electoral race.
(map by Eric Gaba – Wikimedia Commons user: Sting)