Singleton's mother, Sharonda Coleman-Singleton, was one of the nine people killed in the Charleston AME Church massacre in 2015.
"A man walked into my church with hate in his heart, murder on his mind, after he was misled and mistaught to think we were different because we look different," he told attendees.
Download the ABC7 Chicago News App
Singleton said he can't control what happened, he can only control how he treats others moving forward.