In one sentence what is this poem about

Who’s them

1, too, sing America.
I am the darker brother.
They send me to eat in the kitchen When company comes,
And lat well.
And grow strong.
Tilbe at the table
When company comes.
Nobody'll dare
Say to me,
"Eat in the kitchen,"
Then.
Besides, They'll see how beautiful I am
And be ashamed--
I, too, am America.

This poem is about a person of color asserting their identity and worth in America, despite being marginalized by society. Them refers to the societal expectations and prejudices that the speaker faces.