Spot-on.  Well put.
Some additional information about the ICC international law régime is in order.  Realizing, post-Hitler, -Stalin and -Pol Pot et al that genocide and mass murder of citizens with utter impunity is simply not on, the international community finally enacted, freely, a tentative international prosecutorial and adjudication scheme under the Treaty of Rome.  The idea is simple: populations have fundamental human rights under international law, and must be enforceable against leaders who regard entire populations under their governance as butcherable.
It is simply beneath the dignity of any self-respecting ICC member state (and its government and cabinet) to claim that this or that prosecution is not impartial, hinting that race, religion or African-ness constitutes bias. 
The ICC record establishes that genocidal killers of every colour, religion and origin are being tried under the ICC statute.
Africa has its fair share of such killers from north to south.