Standing outside of Centura Health Primary Care in Thornton on April 6, two men dressed in all-white garb — except for a large, blood-red mark on the crotch of their pants — faced traffic and held a large sign saying, “CIRCUMCISION PENIS MUTILATION.” The protesters, part of a group called the Bloodstained Men, were out in force demonstrating against a video that Dr. Corinn Gayer, a primary-care physician at the Thornton clinic, had posted online, in which she discusses circumcision and her preferred method for performing the procedure…