“Blacks jive up their language to differentiate themselves from the white culture.”
No, that is just poor English; the attempt years ago to have “ebonics” recognized as a dialect was an admission that English was beyond the comprehension of people who were illiterate anyway. When you receive an email from someone that speaks “jive”, you realize this isn’t about speaking - they can’t read, write or spell.
No, most of it is intentional.