You're not sure what side that is supposed to be? That's not good. You're also ultimately promoting more human suffering by trying to conform to the desires of racists. With them, it's sort of a slippery slope; it takes a lot to make a racist happy. If it's not biracial people, they'll find some other group of people to treat like shit. All of these groups have more depression and anxiety, but it doesn't mean that they're the problem.
I've lived exclusively in cities in the US, so I've had many biracial friends. Most of them were happy and well-adjusted people. All of them were at least healthy enough to know that any anxiety that existed around their identity was a problem with the assholes in society, not the people who mattered and who they'd focus their energy on.
It's a good approach to life in general. I have a lot of aspects of my identity that loads of assholes around the globe hate. When I was younger, I wasted endless amounts of time and energy thinking about what literal scum of the earth thought of things I had no control over. It served me in no way whatsoever. If you choose to live life with such a cripplingly toxic mindset, that is your choice. You just ought to know that you're the one condemning yourself to excruciating levels of suffering. Don't imply the rest of us are fools for wanting to live life without the considerations of literal human shit.