By James Price El Salvador’s president has transformed his country’s fortunes and won an electoral landslide with his zero-tolerance approach to gangs. We should take a similar approach to the hardened criminals involved in the riots, says James Price Mercy, justice, grace. Heavy themes for a Wednesday morning, more often dealt with from the pulpit than the pages of a newspaper. But there has been much discussion of them in the aftermath of the rioting that broke out across our country. Many wanted justice to be swift as a deterrent against future unrest. Others felt that those caught up in an…