lol What is your tribe? Black isn't a tribe. Black people even just in America are not a monolith, so that's nonsensical. As far as mixed people go, not all mixed people look like Mariah or can pass for white. There are plenty of mixed people who are 50/50 split that don't look much different from the average Black American.
I just don't get why people like you feel you're qualified to be the arbiters of blackness. You just making up scenarios for other people's lives when you don't shit about what they've gone through. Nobody is trying to make mixed people black out of envy. That's your head canon. Mixed people have been considered black for as long as the concept of blackness has existed. That's what you don't seem to understand.