Bart Campolo is the Humanist Chaplain at the Univ. of Southern California, the host of a fantastic podcast called "Humanize Me," and the author of a new book written with his evangelical father Tony Campolo called Why I Left, Why I Stayed.

Bart, if you haven't figured it out already, is the one who left Christianity. The book is all about that conflict, and their love for each other, and how they can both advocate for beliefs that are in direct competition with each other without losing their own bond.

I spoke with Bart about how his parents were devastated by his apparent apostasy, what atheists don't get about Christians, and why hot dogs aren't the key to a happier life.