By Rollo Ross LOS ANGELES (Reuters) – Walt Disney Co’s new animated Pixar movie “Lightyear” features a gay couple, the latest step by the company to show traditionally under-represented groups on the big screen. Actor Chris Evans, who voices the main character in “Lightyear,” applauded moves to reflect all types of people and said those who react negatively should be disregarded. “The real truth is those people are idiots,” Evans said in an interview with Reuters Television ahead of the debut of “Lightyear” in theaters on Friday. “Every time there’s been social advancement as we wake up, the A…