It may not be possible to consider the case of George Zimmerman, who was acquitted Saturday of all charges in the killing of Trayvon Martin, as anything but a sad commentary on the state of race relations and the battle over gun rights in America today. Certainly it is about race — ask any black man, up to and including President Obama, and he will tell you at least a few stories that sound eerily like what happened that rainy winter night in Sanford, Fla. While Mr. Zimmerman’s conviction might have provided an emotional catharsis, we would still be a country plagued by racism, which persists in ever more insidious forms despite the Supreme Court’s sanguine assessment that “things have changed dramatically,” as it said in last month’s ruling striking down the heart of the Voting Rights Act. (The Justice Department is right to continue its investigation into whether Mr. Zimmerman may still be prosecuted under federal civil rights laws.)