zimunzucz:
"The Charleston shooter, Dylann Roof, had been arrested months earlier and was caught with powerful prescription drugs-- drugs that can cause a person to act out violently."
Yes, they can do that but Roof did state that blacks were responsible for rape and the destruction of America. Medication is not likely to effect or change your prejudices even if they can take you to the point of violence.
garyneal:
"When I see someone flying the confederate flag I am thankful that we have the freedom to do so, even if it means that others might be offended. I don't prejudge them as stupid."
You can say the same thing in Germany about the swastika being a part of German history and even bring up that Hitler had some good points (He did build hospitals and schools.).