Yes but it doesn’t truly define who Uncle Tom was, most of today’s black youth have never read the story.
Uncle Tom was:
Literate
Honest
brave
A Devoted Family man
A Minister
A tragic hero who almost earns his freedom three times only to lose his life when his freedom is at hand in the money his wife earned to purchase his freedom in the hands of the son of his former master and his friend who traveled to the worst parts of Louisiana to save Tom from his fate and keep his promise to him.
Uncle Tom was not some old slave broken under the whip and made subservient he was a Man of God that accept his fate as part of God’s plan for him and lived his life honorably. The cruelest tortures he endures at the hands of Simon Legree (an atheist) are directly a result of his faith in God and God’s plan for him
The Stereotype of Uncle Tom comes from The various black face Tom Show rip offs often meant to amuse audiences.
I didn’t know all that. So, when the phase “Uncle Tom” is used as a pejorative, it mocks and belittles all of the character’s good qualities, which were many.