I definitely don't agree with anything he has said, nor is it acceptable in any form. If he's referring to you openly as an "immigrant" or "monkey", I also doubt that he's the type of person that would dramatically change his behavior after you flag it.

However, I still think that you need to communicate to him that the way he is behaving is deeply unprofessional as a colleague and completely unethical as another human being.

The 6pm issue is a kinda moot & one could ask all kinds of questions such as 'why didn't you eat earlier?' but I honestly think it's irrelevant.