This is entirely delusional. Not only did the history of firearms in the United States not begin in 1836, but its inception was European and had nothing to do with slavery. It did have a good deal to do with defense against marauding aboriginals Indians Native Americans uh, nature-loving peaceful indigenous populations, but I can see where a hardline liberal such as Moore might have a difficult time fitting that into his worldview.
In fact, what this is really all about is precisely that - Moore carefully selecting isolated facts, ignoring the continuity of history, and twisting them into a pathological tirade against those that the last line of the article shows the condescending bastard as having hope for after all. That would be us. And the hope he has is that we might someday be persuaded to accept his delusions as facts and become as smart as him. Right, Mikey, you betcha...