I don't think it was meant to be racist. I think the artist was trying to bring attention to the police brutality issue.
uh.....
it looks more like a political cartoon criticising police officers than an attack on black folks. Elmer Fudd (stupid and boorish) is dressed as a police officer and just like he says "rabbit season" instead he says "Negro Season". I wouldn't be surprised if the person who did it was black themselves....
Do you guys ever consider or read context when you see things like this or just react on reflex?
OP had peoples mind going in one direction with the title because I expected something racist. It very well could've been a black man that created it.