hvad handler dette om? forstår ikke??

hej. er der nogen der kan fortælle mig hvad dette digt handler om?

There are bombs standing
On the corners of the cities
Waiting to explode
At the slightest touch
Baggy shadow street boys
Stand cocked ready to fire
Their eyes are grenades
And the pin is about to be pulled
BOOM!!!
The brother went off
Pressure pulled the trigger
And the brother became a nigger
And no one could figure out
How it happened
What went wrong?
He had a chance
Somebody even loved him
Even told him that he was better
Than most
But he went off
Chains rattled inside his brain
And his sky was filled with clouds
That didn't even bring rain
But just the illusion
That something was coming
So he became a gun
That he could hide in a jacket
And make believe he had an erection
All the time
He could penetrate anything
His tongue was a curse
His attitude was a bullet
And he'd shoot you down
Without a second thought
Grenades in their eyes
And death is their prize
Peace will arise and destroy the lies
So he became G.I. Joe, killing his family

(link til resten af digtet:     http://rapgenius.com/The-last-poets-black-rage-lyrics     )