The American people had to do a countrywide uprising just to get the courts to prosecute one case but go off 👍

You're taking an overly specific definition of lynching and framing the situation wrong, and coming to a bad conclusion.

A court's refusal to punish it, in nearly every case, is tacit support. They aren't saying "please, lynch!" but they're saying they won't punish lynching.

This also easily fits any definition of lynching that's not so restricted so as to only include "hanging black people from trees in town squares".