Stereotyping is a dangerous mindset. Is Jeffrey Dahmer representative of all white men? Do his actions damage the reputation of all white men?
That type of stereotyping cuts both ways. For example, I cannot count the number of times on these threads that I've been called an atheist primarily because of statements by scientists to the effect that evolution implies atheism, which is simply the personal belief of that scientist and nothing to do with the actual content of the theory of evolution.