An old BBC article, but since it seems that Al Shabab will have full control over southern Somalia probably sooner than later, it is... relevant:
Since they began to capture large swathes of southern Somalia, radical Islamists have been undertaking a programme of destroying mosques and the graves of revered religious leaders from the Sufi branch of Islam.
The destruction of non-approved religious sites started last year when they began to knock down an old colonial era church in the town of Kismayo.
Most Somalis are Sufi Muslims, who do not share the strict Saudi Arabian-inspired Wahhabi interpretation of Islam with the hardline al-Shabab group.
They embrace music, dancing and meditation and are appalled at the desecration of the graves.
But al-Shabab sees things differently.
Read more @ BBC News