I don't know who the artist is, I don't really care. what I can say in simple terms is that art of any kind is an interpretation of thoughts deep within one's psyche. the artist is capable of manifesting these thoughts in their chosen medium be it paint, ink, performance, or sculpture to make a statement that raises some kind of social awareness. the statement succeeds when the audience is prodded to feel anger, sadness, joy, or indifference.
go beyond the predictable feelings and ask not why this 911 was sacrificed, but why was its oil and coolant ceremoniously displayed in a blown glass vessel next to it?