The artist apparently doesn’t realize this has never been an issue at the level of the Supreme Court. Even the Cruikshank decision in 1875 and the Miller decision in 1939 supported the individual rights interpretation. And if they would have read the Heller decision they would have realized this was settled law two years ago rather than something new with the McDonald decision last week.
But, by definition, bigots have little need of facts to maintain their belief system.
[H/T to Reese who sent me an email with the link to this cartoon.]