You are right in that the Grand Jury indictments, specifically the lack of indictments, has caused great stress and fear and anger in the church. I commend you for attempting to pastorally care for the church. Unfortunately, your letter doesn't do that.
It's not all that surprising that people are turning to conspiracy theories for meaning. In an age where most sources of expert authority--teachers, doctors, scientists, lawyers, religious leaders--are increasingly viewed as anywhere from unreliable to outright evil, figuring out who to trust can be a difficult choice.
Content Warning: September 11, injury, death
O Lord, hear my prayer and let my cry come before you.
https://youtu.be/6x-0uyjMTeU A Sermon for the Sunday after the Commemoration of the Emanuel Nine and Juneteenth. Preached at Bethlehem Evangelical Lutheran Church in Indianapolis, IN.