That's not how I remember it. The only thing resembling a fact is that the Wanga were the only precolonial Kingdom in Kenya(they were part of Uganda protectorate at the time), likely formed by refugees from Buganda. They were tiny compared to the other Ugandan Kingdoms.
Why is Sakwa Ongoma is making up facts on the fly? Dude is nuts.
Mumia was a collaborator that would make this dude look like Denmark Vesey.