I doubt it. Tombouctou is strickly islamic, anything sacrilegious was/is/will be destroyed.
Out good friend Qadaffi is spending $ 800M to built a mosque there, allegedly his mother was from Timbuktu. His goal is to have that region break away from the rest of Mali.
For a lonng time hardly anyone in Timbuktu has been able to read these documents. If you can't read it you can't find sacrilege.
Moslems copied lot of Greco-Roman material but they probably destroyed even more. Hard to say what is down there.
Actually, Islam has protected quite a few lost "Western ideas". And, of course, there is always the possibility that even if some "did" wish to destroy such antiquities, that their very obscurity would protect them
Mali is one of the very, very few African states that are properly and democratically run — an oasis in the midst of a cesspit of crime and corruption and kleptocracies.
I hope they continue along the path they are on: if any African nation could use a bit of good press, Mali is the one.