Saudi heads a Human Rights Council.
Mugabe wins a peace prize.
Which is more unbelievable?

Obviously, the first one is more unbelievable. The Saudis are the biggest perpetrators of human rights abuses in the world right now. They openly practice slavery, and they are currently trying to export their perverse ideology to the other regions in the world.
On the other hand, Robert Mugabe is not the biggest warmonger in the world. That honor should go to Kim Jong Un or Hillary Clinton. It is true that a large number of white farmers and black farm workers suffered under his rule. But at the same time, large numbers of landless blacks were allotted small plots of land, which enabled them to achieve self-sufficiency.