I know why a cage bird sings

I think this mood about this poem is depression and not fair because in this poem it compares two birds to two different humans. One of this bird is free probably because it compares that bird to a white person because back then white people were FREE and they had the life to do anything and had the chance to do anything. Life for them was easy. The second bird is compare to a black person I say this because during the days [slavery] black people didn't have the chance to do what they [wanted] to do and there slave owners would tell them do things and do it right away and if they don't do it they suffer consequences such as living behind bars or getting weeped for some silly reason. And what's complicated is that they don't know how to read and write but god gave them strength and dignity and a great passion . I know why a cage bird sing!