Maybe Valerio is black. I often hear black people turn to themselves, 'nigga'. Often in a normal conversation. But if white uses it, it must be either racist or moron. Because it was made by white people slang ,,nigga'', especially in America at the beginning of the 20th century.
But if you are a white Valerio then you must be a racist or a complete idiot. I think u are option nr 1. Or maybe both.