Well, of course a lot of people stop caring way before. I'm not saying introspection is not necessary because we are all wired to automatically create groups by

Well, of course a lot of people stop caring way before. I'm not saying introspection is not necessary because we are all wired to automatically create groups by excluding other people from them be it race, religion, gender or whatever other reason. It's good to rationally think about your own biases. My point is precisely that other people is continuously drawing lines and everything is binary.