Why is huck ashamed of the human race

In Huckleberry Finn, Huck encounters things like feuding, murder, and slavery, which make him see life in a different light. He used to be carefree, but now he sees the weight of the world.

The cruel approach of the scam surprises even Huck, and he comments that "it was enough to make a body ashamed of the human race." The events of Chapter 24 reveal that the duke and the king have taken complete control of the raft and its travelers.