Louisiana rap legend Master P says Tyrann Mathieu is totally wrong about their home city ... saying rap music is not causing the violence in New Orleans ... the people are.
P was out in L.A. when we asked about comments Mathieu made in the wake of the Will Smith shooting in which he blamed a culture of violence -- including rap music -- for contributing for the city's murder rate.
Check out the clip ... P -- a man who helped pioneer the N.