Maybe you need a refresher in what happened because your recall seems to be inaccurate.
Rumors spread that Dick Rowland, the shoeshiner, was going to be lynched for his alleged assault on the elevator operator Sarah Page (the police had already quietly investigated the matter and determined it was likely not assault…however they had Rowland in custody, mostly for his safety while they continued the investigation…most folks in Tulsa who knew Rowland…both blacks and whites, both professionals and not, did not believe he either committed or was capable of assault. But in those days, the accusation alone was enough to cause some people to take justice into their own hands).
The blacks you were referring were a group of 75…some of them armed. They went to the jail to protect Mr. Rowland…however being assured that the authorities had the matter under control, they left peacefully, and were attacked by several white people, one of whom tried to disarm one of the blacks. A shot went off, and the rest was history.
So…in what way were the blacks you referred to “not innocent”?