Here's a start...but my sense is that you are not open to really learning about this but just interestred in defending your position. I could be wrong... but here you go:

Redlining, Gerrymandering, Housing Segregation, Law and Order Politics, GI Bill, Management of the Drug Epidemic, Confederate Statues and Symbols, Wealth Gap, Healthcare Disparities, Education Curricula and Disciplinary Practices, Employment Practices that Promote “Resume Whitening”, Immigration Policies Used as Deterrent Tactic...to name a few.

You can check my website for an extensive bibliography of readings for each of these areas of systemic racism or simply google.