? It is tribal. Kiir belongs to the dominant Dinka-Kikuyu-Uhuru-conservative-genocide alliance whereas Machar supported by the second most populous tribe purported peace embracing Nuer-Liberal-Western-nontribal faction.
Windy is correct to say a recipe for genocide should Kiir not be uprooted. He needs to step down.
The Dinka people (part of the Nilotic group) have no centralized political authority, but are instead organized by several independent but interlaced clans. The Dinka people are the largest group in South Sudan, representing 35.8% of the population in 2013
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Nuer people (27.6% of the South Sudan population living primarily in the historicGreater Upper Nile region along with a significant number of Dinka).
https://en.m.wikipedia.org/wiki/Demographics_of_South_SudanThings were doing well in South Sudan when RAO was the prime minister and kept Kiir on a tight leash. As soon as Uhuruto stepped in with their conservative underhanded deals- Kiir went rogue.
Uhuru's kleptomaniacs are there right now helping to plan for genocide. It's just a progression of their initial plans- rape South Sudan's oil through blackmail. Prior, RAO struck up a fair and peaceful energy deal but conservative factions don't have policies for energy & peace. Case in point Iraq, Afghanistan, the Middle East.
http://www.nation.co.ke/news/Uhuru-lands-in-Juba-for-peace-talks-with-Kiir/1056-3363016-xr4aqi/President Uhuru Kenyatta (left) holds peace talks with South Sudan's President Salva Kirr (centre) and the First Vice President Taban Deng Gai (right) in Juba upon his arrival on August 30, 2016. PHOTO | PSCU
In Summary
The two leaders are scheduled to address a joint press conference after holding talks at State House, Juba.Mr Kenyatta was received at the airport by newly appointed first vice-president Taban Deng Gai.
Machar is still in Sudan receiving treatment for an injury suffered in the Democratic Republic of Congo, where he had fled.