Tom Perkins, one of the co-founders of the Silicon Valley powerhouse venture capital firm Kleiner Perkins Caulfield Byers, is afraid the next Kristallnacht — a night of violence against Jews before the start of World War II — will happen in the Bay Area. Perkins, who is 81, perceives a rising tide of hatred of the successful one percent that mirrors the treatment of Jews in Nazi Germany, he says in a letter to the editor in the Wall Street Journal. Class tensions in the San Francisco Bay Area recently flared up over the areas skyrocketing rent and Google buses, private luxury coaches that shuttle wealthy tech workers to the office.