Stereotyping the word Stereotype???

Stereotyping in my opinion can be referred to as classification of people groups using generalized simplifications. Often stereotypes are thought to be bad and, don't get me wrong i agree but my question is it the case or are we in this case just 'stereotyping the word Stereotype'.

 'All Muslims are terrorists' or 'All Asians are bad drivers' are common negative stereotypes in the world since they hurt the group of the classify but how come when someone else says "All Black guys are good at Sports" it doesn't seem to be a problem for the blacks at least, that example may be harmful to other groups of people but it is definitely look at as a source of pride to the blacks.

 My point is that are stereotypes only termed as stereotypes if they are negative? Or are all stereotype to at one point a good thing to a group of people...."America is the land of opportunity", this stereotype dumbs down other areas in the world but is seen as a good thing to the American people.

So are all stereotypes negative? Or are we just Stereotyping the word?