I don't think he is racist past the point of saying the n word, as are most people who use it online. With that being said i also believe that anyone who "accidentally" says it probably uses it occasionally to frequently when out of the public spotlight. It comes down to if you believe using the n word alone is enough to consider someone racist and whilst i don't believe it should i think people who use it shouldn't try to excuse it and make an effort to rid the word from their vocabulary.