I classify people according to a hierarchical structure based on race and height
Is there a reason that you need to classify them at all?
It makes it easier to decide how I feel about them.
Sometimes it is easy to deal with people when you put them in certain boxes but people don't fit into boxes, everybody is different and should be treated that way. If you classify people based on race you will be thought of as a racist.
What does it matter if I'm a racist? Are you going to call me a racist because I'm good at imagining people's personalities?
It's not right to try and classify people based on race and height. It won't work out in the end because people are different and not what you assume them to be.