It is sad that to be a left-winger is to be a hatemonger, but the death of conservative media activist Andrew Breitbart has certainly brought out those true colors of the left. The giddiness displayed and cheering indulged by America’s leftists over the fact that Mr. Breitbart died late Wednesday night has been shrill, disgusting, and suffused with the lamentable inhumanity so commonly found in the hearts of leftists everywhere.