Looking at the definitions of race and ethnicity, Markus defines them rather specific and too extensive to quote here. So read the article for an in-depth perspective on the subject.
Basically it comes down to that both are historically derived and institutionalized ideas and practices. The former groups people by physical and behavioral characteristics, the latter by (presumed) commonalities.
When you define race and ethnicity, 2 features are highlighted: other people create them, and they are not biologically based things that people have. Creating and enabling difference is a social process that involves both in-group and intergroup relations.
Surely you were influenced by your upbringing and education. By your friends, your classmates, your first girlfriend/boyfriend, your first break-up. By the first time you kissed someone. By the first time you had sex. It makes sense that those things shape you into who you are today.
But what if you have been influenced on a deeper level? Like a blueprint or instruction on how everything should be. Or behave. Act. Or something like that.
Okay, fair enough. That does sound like a load of crap. Let me explain:
“Being a person requires others and their context-specific ideas and practices.” This kind of sums up everything you have read up until now, but it might change perspective. Back to the title, I was born this way. Think about it. Everything you are is because of WHERE you were born. It is funny actually. How 1 “tiny” thing can be that much of an influence in who you will become.
How you think is because of where you were born.
But seriously, think about it. We love labeling things, put things in boxes. To frame them. So we “understand” them better, or so they say. Your race, ethnicity, nationality. Your sex, or gender, or sexual preferences. We all like to label them. Form groups around them. Communities. Hell, nations even.