Galia, telling fables is not my section, if you are going to make a claim or an assertion, either provide an academic reference that will substaniate. Do not come to me with unfounded assertions and especially refuted assertions.
Mareexaan were never pushed south nor where they originally from Mudug. Mareexaan along with Daarood first settled in Northern Somalia but gradually pushed down south with Absame whilst Harti stayed behind pushing North-West.
Evidence:
http://img187.imageshack.us/img187/6157/mapnw1.gif (mid-nineteenth century)
The final push toke place around the time of the late Maxamed Cabdulle Xasan (RH) whom we assisted by migrating and providing forces to the south. Turton writes, "the Marehan who came south were by and large, his supporters and many at some time fought with him"
http://img169.imageshack.us/img169/2002/makj9.pngWhilst Hawiye were adopting larger and larger groups, Mareexaan devised laws and imposed it.
Now the burden is on you to provide evidence where Mareexaan intermarried with Oromos or Bantus, not that I am against it by the way.
By the way, there are no Oromos and Bantus in Gedo, do not confuse it with the Jubbas.