No you misunderstood me. I always had a sinking feeling that something was seriously wrong with my life but it wasn't until my mom passed away that the pieces of the puzzles started to fit together. It started with my uncle and aunt telling me a piece of information that was hidden from me and it wasn't until my mom passed away that they were able to come forth with this information. Since then I been doing a lot of research and wonder what else did my parents lied to me about. I did confront my dad about this information and he confirm it was true and that both him and my mom never wanted me to find out.
I don't look fully Korean, I look mix. I have big eyes like white people but an overall asian face. I have both asian and white facial feature. When I took a strand of my dad hair DNA and was able to do DNA on it and found out he wasn't my real dad, that when things became a whole lot complex.
So the bottom line is you were adopted as an infant and your parents didn't want you to know you weren't their natural child, and your a mutt.
The second part is easy, the vast majority of people in the US are mutts. So get over it, join the party, and accept that your not a purebred.
Your parents not wanting you to know you were adopted isn't a bad thing, they did it to protect you, not to hurt you.
The simple reality is you have one and only one course of action, sack up and accept who you are. If you don't like the man you are, that's not your parents fault, and there is only one person who can change that. So make the only choice you have, and make the best of it.
I wish you well.