That is a large chunk of history and a lot of people were in it. You've put forward 1 name. Although there is an argument for your position, you haven't made it. Can things even have been said to have changed if there was 1 example in the 50s and 0 examples in 2020? That is a low-signal trendline.
People still felt the need to propose an anti-lynching law in 2020 [0] so maybe lynchings are an ongoing problem. There isn't anything to argue about without actual evidence.
The point about a lynching is it is a message. Imagine the power dynamic between a black man and a white man in the south, when the black man knows that the white man can murder him and get away with it.
This particular lynching was obviously not the only proof of this reality in the decade.
