Media Relations After ‘Kristallnacht’ letter, venture capitalist issues apology, but no retraction Tom Perkins, co-founder of the Silicon Valley firm Kleiner Perkins Caufield & Byers, earned scorn for comparing recent protests in and around San Francisco to Nazi Germany. By Matt WilsonJan. 28, 2014 SHARE Ragan Insider Premium Content To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.