I am not surprised that the New York Post failed to be aware that their cartoon of two policemen shooting a chimp is racist. It is yet another example of what Malcolm Gladwell referred to in Blink, that "people are ignorant of the things that affect their actions, yet they rarely feel ignorant."
Running this cartoon in a newspaper sold to the general public, then denying its racial connotations indicates that the Post editors have completely internalized this society's racist traditions. They don't even know how racist they are.
New York Post, now that your racism has been pointed out, don't be cowards. Have the courage to apologize.