(As appearing on The Huffington Post site: http://www.huffingtonpost.com/entry/bias-in-the-burbs_us_57d6bfa7e4b0eb9a57b7b00d) As I gingerly lowered myself to the gym mat, over 50 but needing to do at least 50 sit-ups, I heard a conversation taking place near the free weights. Two men in excellent shape having a not-so-great conversation about the Dallas shootings and Black Lives Matter. What I could …