Is using the phrase more better as form of humor racist since it is understood that an adverb more should not not be used to modify an adjective better?

The phrase "more better" ("mo bettah") is a term in pidgin English having no racist connotation.

Racist is defined as having or showing the belief that a particular race is superior to another. The only difference between the equally racist statement "My nationality is more better than yours" and "My nationality is better than yours" is that the former is grammatically incorrect. Better is already in its comparative form, so the comparative adverb is not needed to modify it.

Humor is defined as the quality of being amusing or comic, especially as expressed in literature or speech. Being that racist statments are extremely insulting, there isn't anything humorous about them.