After being on this earth for 66 years I think stereotyping is the continuous and repetitive behavior by a particular group which is negatively emphasized by another.
We unfortunately stereotype blacks as lazy because so many are on welfare and they like it! We stereotype them as criminals because so many of them are in prison!
We stereotype Italians as Mafiosi because a portion of them are Mafia members.
We stereotype Jews as money hungry greedy bastards because it appears to the casual observer that’s all they’re interested in.
Now we stereotype all Muslims as terrorists because the Koran says “kill the infidels!”
You get the picture