Did the 'divide and conquer' doctrine turn Nuer & Dinka foes?

In the nineteen century, when European came to Africa with a bible on one hand and conquest on the other, the geopolitics of the entire content changed forever. It is now public knowledge that their coming resulted in mass displacement, exploitation of valuable resources, maiming and murdering of innocent civilians, and christianitization of the populace.

According to folklore, the Nuer and Dinka people, who are believed to have a shared divine ancestral origin, had lived peacefully side-by-side prosperously for hundreds of thousands years. But something went terribly wrong in the early nineteen century after the two communities armed only with spears and clubs, fought vigorously and defeated the heavily armed British with modern weapons of that century.

Because the Nuer and Dinka people stood and fought together, they prevented mass-europeanization of its populace, hence, resulting in preservation of own cultures and traditions, which by comparison seemed to have been built on ten commandments.

The news of defeat was not well received by the monarchy back in England. British, being some of the smartest calculative people on earth, had to fight back soon and swiftly using psychological warfare through 'divide & conquer' to win and bring under their 'iron-fist' rule the Nuer and Dinka.

According to Nuer and Dinka folklore, the British people introduced bodily marking, or branding to identify, isolate, and segregate the populace of both communities. Each community was allegedly said to have been assigned unique facial marks and bodily tattoos as symbols of identify and manhood. Even women of both communities did not scape branding. Were the facial marks and bodily tattoos, the alleged byproduct of ‘divide and conquer rule’, the root-caused of today's rivalry and enmity between the Nuer and Dinka people, with each wanting total domination of the other?

After a successful branding of both communities, the British people employed a psychological warfare machine to plant seeds of evil hatred deep down in the core of the hearts of the Nuer and Dinka people. It's alleged that the Nuer people were told they were the bravest and fiercest fighters. The Dinka people, on the other hand, were allegedly told they were better leaders and the smartest in the land. According to folklore, the planting of evil seeds using the master-plan did not end there. Both communities were encouraged to raid each others' cattle to gather and accumulate wealth. Was this why the Nuer and Dinka people, who shared the same bloodline through common ancestral origin and marriage, are always at loggerhead politically, each wanting total domination over the other?

If the answer to any of the above questions is definite yes, or may be yes: why can the learned Nuer and Dinka people  undo the evil of the master plan and work together to reverse the evil cycle that is threatening the very foundation of South Sudan by preaching unity, peace and reconciliation?