I, too, am America.
empowers black people, particularly dark-skinned ones who is described as a victim of colourism from his family (send me to eat in the kitchen/when company comes)
similar to Let America Be America Again in how the speaker empowers themselves as being representative of the nation and not being destined to this lower class and oppression
the three commas creates space and pauses when spoken, sounding careful, cautious, but also serving as a warning for the speaker's oppressors <-- they are no longer willing to be hidden away in the kitchen and need the readers to know that they are going to represent themselves in America