Stereotypes: The "common" thing to do now

Stereotypes are so widely known by so many in our society today because they are spread out so quickly by people. Like if you know someone that is this particular religion or race, and he does something that you do not usually do, the you will have a general idea that people that are this particular race or religion, also do that. And that, is not true. It can be, in some occasions, but you do not have to make assumptions from one single person. This stereotypes are getting more and more common to do and this is not good.