Do you think it is a dangerous thing to judge about a nation by existing stereotypes?

I think that we shouldn't judge a nation by existing stereotypes. Stereotypes are such things in which we trust but we don't think that it could be false. For example: many people think that Russians drink very much, but it is just a stereotype or that British people are rude. All these stereotype's images are formed by cinema, by different stories, etc. Stereotypes are not real description of individual people but unfortunately they still exist and many people believe them.