MITCHELL, S.D. — We acknowledge that former president George W. Bush’s art is not great. But it’s not our aim to poke fun at Mr. Bush’s limited artistic ability. Some in the media have jumped on that bandwagon, probably because it’s easy. Bush’s amateurish style with a paintbrush flows naturally into the long-running narrative about his supposed lack of intelligence, which is a byproduct of his many public speaking blunders. On this issue, though, we think Mr. Bush deserves praise instead of criticism.