Sorry - there is a fatal flaw in his basic premise. Lynchings are rightly assigned as actions on behalf of the lynchers. “Gun violence” is assigned as action by the tools used - guns. To be the same, lynchings would have to be assigned to the rope used - when rope is used.
Anyone who talks about “gun violence” without specifically stating up front that they consider the violence to be an act carried out by an individual using a tool is emitting propaganda against a basic tool that is to be unfettered by the law.
I am guessing that you did not read the entire article. You should. Williams major point is not “Gun Violence”.
Williams in his article is making the point that guns are not at the root of the problem with the high rate of black on black murder.
I believe that his analogy of lynching and black on black murder is that Lynching (white on Black murder) is often used in the media as a method of whipping up emotion for the cause but far more blacks have died at the hands of other blacks and this issue prominent by lack of attention it receives in the media and by black politicians/opinion makers.