I'd say that institutionalize/systemic racism in America makes it exceedingly more likely that a minority will end up poor and exceedingly more difficult to get out of ---> poor neighborhoods --> more crime ---> broken window policy ---> problems we've been seeing recently.
Conversely, a rich kid in a wealthy neighborhood(that probably doesn't have police at every corner) could be smoking weed right now. Nobody will notice/care, and even if they did some millionaire parents will make sure things work out for the best. And we know the general demographics of rich neighborhoods. It's not that only minorities commit crimes, but the police are always heavily more present where minorities are often located. It's death of a thousand paper-cuts. Housing discrimination, workplace discrimination, poor neighborhoods with horrid schools, war on drugs, excessive police presence/force. Then when they end up poor & desperate, the police are right there waiting for them to step out of line. "See?! We got him committing a crime!" ...without understanding everything in America that led to the event. And when the police jail/kill these people(often black men), you've potential just taken a father away from a family and there's now a young child without a father... and the cycle almost unavoidably continues.
The war on drugs has been a huge driver of this cycle. End it and I think we will see a change for the better. Won't solve everything, but it'll be significant improvement.