King Charles and Queen Camilla’s successful US tour this week underscored just how idiotic and ill-conceived Prince Harry’s behavior has been over the past six years. He was not invited to any of the high-profile events in Washington — where the royal couple attended a state dinner and Charles addressed Congress — or New York City, where the king and queen laid flowers at the 9/11 Memorial in the morning and partied with celebs at night , despite living in America himself. In a different world, there would have been a place for Harry, a natural-born people person.…