**Conspiracy theory**
So this is a conspiracy theory as i have 0 evidence not even circumstantial:
The descendents of the #ProphetMuhammad (may God mention him among the angels and grant him peace) still have important Islamic duties that only they can fulfil such as the #Caliph and #ImamMahdi (the one who will support #Jesus son of #Mary against the anti-#Christ).
It is not a stretch to think some persons in power would decide, like the #Pharoah in the time of #Moses, to kill off the descendents so the #prophesy doesn't happen.