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I wanted to share an article but after read/scanned ~6 of them - I had nothing to share. They weren't any good. I wish blogs were still a thing. Blogs can be excellent on topics like these. Here's the Wikipedia page - Columbine High School massacre.
He's not exactly wrong though, since gun control historically in the US was a lot more about taking guns out of the hands of PoC. One modern case was in California with the Mulford Act, which came about because the Black Panthers showed off the the thing whites fear the most has and still will be black people open carrying guns.