As a POC who grew up a majority of his formative years in poverty stricken neighborhoods, this was almost like an unspoken truth. We can rarely speak on this without being hurled with accusations of racism, prejudice, and anti-blackness. To be honest, I was harassed and bullied my whole time when I was living in inner city Houston due to my hispanic ethnicity. Unfortunately the most blatantly racist and prejudice towards me where black folk. I still correct and try to educate my old school hispanic parents on their prejudice towards the black community, but I can't say they're saying it out of pure ignorance and without reason. They saw the very same things you describe and they saw the scars inflicted on me by my "POC" peers. Shit hurts. But hard truths cut both ways.