I don't think the media is the only thing that determines whether we form racial or any other social identity categories.
I think racial categories are identities imposed by us and by others. By us because sometimes, especially when we're in groups of people who don't look like us, we may tend to stick closer to people who do. By others, when they see someone who looks different, they often label us with a term separating us from their group.
I agree we're all a meld and deeply human, with a lot in common, and I also think we tend to form social groups that focus on how we are different from others and how others are different from us.
I think racial categories are identities imposed by us and by others. By us because sometimes, especially when we're in groups of people who don't look like us, we may tend to stick closer to people who do. By others, when they see someone who looks different, they often label us with a term separating us from their group.
I agree we're all a meld and deeply human, with a lot in common, and I also think we tend to form social groups that focus on how we are different from others and how others are different from us.