Childish Gambino

what is the beginning scene supposed to symbolize, and why is he shirtless. Why is he is killing all of the black people ? Why was he shirtless throughout the video ? what was his motive for creating the video like this then calling it “This is America” ? I wonder if this video made him feel uncomfortable in anyway although they were actors how did he feel in the inside when he pretended to “shoot” them. What was the point of him shooting all of the colored people , was he trying to symbolize that this how America really is ? What do the white people at the end chasing him symbolize? Does he feel as if this is how America really is ? The video is very entertaining and exciting .