When you ask someone, “Who are you?” They'll likely state their name and then other labels like gender, age, ethnicity, etc. If you ask them to go a little deeper, they might start talking about their family or nationality. Maybe they'll mention their political affiliation. All of that is fine – I'm not saying there's anything wrong with identifying in that way, but can identity go further than that? If we stop our identity at a certain point, when I talk about “my” children and “your” children, it's easier for me to put “your” children in cages.