My daughters boyfriend is black!!!?

i dont have a problem with black people, but the crowd he's been hanging around has been influencing my daughter, i mean he comes around my house flaunting his money, and showing me his fancy cars and his parents new house and stuff!!! and then his friends bring their filthy language around... saying bad words like "caviar" and "escargo" i dont want my daughter hanging around these filthy rich folk... how do i tell her to stop hanging around him?