> "I do believe he cared just as much for his people as white folks does for their'n. It don't seem natural, but I reckon it's so."
This alludes to the Biblical story of the Good Samaritan. The Good Samaritan was a man who helped a stranger who had been robbed and beaten, even though the stranger was from a different culture. In Huck's statement, he's implying that Jim, a slave, is capable of love and compassion, just like any other human being. By drawing a parallel to the Good Samaritan, Twain is subtly suggesting that Jim is deserving of empathy and respect, despite the societal norms of his time.
This is just one example of Twain's masterful use of allusion. He frequently used allusions to the Bible, Shakespeare, and other well-known literature to enhance his writing and provide deeper meaning to his stories.