No, not everyone is judged by stereotype. Liberals do have a tendency to do just that, though.
These are my conservative friends I’m talking about. You are doing just what I described, assuming that because people are liberal they are more likely to stereotype.
The hierarchical instinct is deep in our culture. Ever hear about the pecking order, ever see Apocalypto? Americans supposedly do not have an official class system but we are just as susceptible to stereotyping as the rest of the human race.
You have to read the thinkers on this subject and work on your own outlook at some point in your life. Read the Letter of James: Have not respect of persons. That has to be deep within you so that you can see the spirit of the person you are talking to rather than the visual image.