The answer is Free themselves from imperial control.
Even after decolonization of European powers, many states in the Middle East remained in some part under the control of European powers such as Britain.
The modern states of Dubai, Abu Dhabi, Oman, Bahrain, etc were all British Protectorates well into the early 1970s.
Gradually, as the European power powered weakened, new independent shikhdoms were established in the middle east.
