Earlier quoted context omitted.
I was stopped too by police and one time briefly searched, so what? Being stopped by the police is not a game changer. If you haven't done anything wrong you'll walk away and go to work and back home. Why is being stopped by police such a big deal? I think the police should do more of that in the US, it would reduce crime considerably.
Let's work through a hypothetical. Say that drug use is evenly distributed regardless of race across a group of people. If orange people get searched more frequently, even if every search is equally justified, then the number of orange people being prosecuted for drug infractions would be disproportionate. Note: I am not making a statement about the propriety of this, but merely working through an example of applied…
If black people wouldn't deal drugs, they wouldn't be targeted by police officers. Think of the east Asians, they are discriminated and mocked maybe even more than black people, but they are less likely to commit crimes, so police doesn't target them.