>There are many historical cases of US slaves becoming free and then themselves owning slaves.

There are more cases of survivors of childhood abuse becoming abusers themselves as adults.

The leap to concluding they are pro-child-abuse is, however, similarly tenuous.

>feel great solidarity with people based on skin color

No one is suggesting it would be based on skin color. It would be based on the fact that he had been a slave.

The title of the movie is a hint.