You may have heard that one of the Supremes, a black female Justice, thought that the Black Codes

passed in some states to keep black people from being treated like full citizens was a good justification for Hawaii having some similar laws to restrict the 2nd Amendment.  Which is freaking insane.

Going to borrow this on the subject:
...I understand a lot of people like to cite the black codes who promote gun restrictions, who would -otherwise, they would be garlic in front of a vampire in front of them. But, here, they -they like them, they embrace them. And I'm really interested in why.

I'm sure he knows why, so do I: they hate the commoners having arms without some kind of government permission slip, and they'll use anything they can think of to restrict that.

That link has some real interesting commentary, which includes people claiming "Well, THIS part of the Black Codes were not racist!"  

I repeat, they'll use any argument they think they can get away with to try to get rid of as much of the 2nd as they can.