Edit: I'm afraid this problem has been affecting your comments as well: https://news.ycombinator.com/item?id=25070626. We ban accounts that post like that, regardless of how wrong or how provocative other commenters were also being. I don't want to ban you, so if you would please stick within the site guidelines—including avoiding predictable ideological flamewar generally—we'd be grateful. I realize that's not always easy because these topics have a huge energy and people feel so strongly about them.
2. Systems can be racist in the absence of laws. For example, there are still many whites-only country clubs in the US, and there's no law enforcing that. Schools punish Black children more severely for the same behaviors. Those are just small examples -- there are many.
3. You may benefit from existing discussions on this same topic, such as this one:
https://www.reddit.com/r/changemyview/comments/her5hb/cmv_sy...
Which is why this is a complicated topic bordering on religion or a general mindset. I would recommend to listen to the "Black Intellectual Roundtable" with Bret Weinstein to get some general ideas. It's an hour of discussion.
While there are no longer laws that say "Whites can but Blacks can't", there are clearly laws that intentionally or un-intentionally impact some people more than others.