For five years, St. Louis’ Black Tulip Chorale has fused queer history, music and inclusivity. The group celebrates the milestone May 21 with a special show “Shining Through,” that pairs each song with a moment from LGBTQ history. Founding member Dr. Ken Haller explains the group’s origin story, and how its approach to a mixed voice “all-expression, all-gender, all-identity” chorus has attracted more than 40 singers to its ranks.