The mass incarceration of African-Americans effectively eliminates the Second Amendment rights of a large segment of that population. (Many have observed that mass incarceration, via the drug war, began soon after segregation became illegal: When one tool of mass oppression became illegal, another was developed. There is some evidence that Nixon intended the drug war to suppress blacks and hippies.)

And more importantly, law enforcement responds much differently to guns possessed by black people and guns possessed by whites. An African-American only has to put their hand in their pocket or reach for something, and they are shot. White Americans are encouraged by some in law enforcement to own guns and to use them to prevent crime. People talk about gun owners stopping criminals; you would have to be insane to be black and draw a firearm anywhere around police officers or white gun owners, and especially at the scene of a crime.

That hasn't worked out so well. For example, Wounded Knee, MOVE, Ruby Ridge and Waco.

A century ago, and the rest were people resisting search/arrest warrants. That's generally an incredibly poor idea.

Right wing protesters/militias regularly parade around with clearly visible guns. Now, perhaps there is a double standard w.r.t. how police deal with them, as opposed to left-wing protesters... But perhaps there isn't.