Baggs I am usually at one with you but this time I am sorry we part company.
Where have you lived all your life not to know that describing black people as monkeys as a form of denigration is as old as the hills, going back hundreds of years and to describe it as widespread is to underestimate its commonality. Why do you think it is offensive to talk about black people and bananas, or has that form of insult also unknown to you? The explanation is simple. Monkeys eat bananas therefore if black people eat bananas they are monkeys.
If any more racist insults occur to me that you may not know about, I will make sure I let you know before you end up before your local magistrate on an unintended race hate charge.