I think that this is a nice gesture. For those who are puzzled, I think that they’re just trying to help us to keep our work and programming in perspective by providing a reminder where we might not expect it. If you really need to read the docs you can do it on github. Think of it as a PSA, maybe.
Why would this be a good thing? Why not leave the docs up to help further educate people, but put a banner on top of the site to show respect like Hacker News does?
You can call attention more so by reserving a nice area of at the top of the page and logo while still encouraging people to come and learn. Now people will just go there and leave. I can't see how this would get people to care or care more?
My biggest issue with this is the assumption that racism is involved. Two of the officers involved are not white and the only "evidence" I have seen that Chauvin is racist is a picture of another person.