David Talbot has never been accused of being shy about his views. The founder of Salon and longtime voice for so-called San Francisco values now sees his adopted home as a tale of two cities. In his best selling book “Season of the Witch,” he celebrated the “flowers in your hair” culture that brought a new generation to San Francisco in the 1960s. Today, he sees a global center of tech capitalism that is fighting for its soul and worse yet, may be co-opted by Los Angeles.