This was discussed at the time of the incident, I think on The Firing Line. No consensus, if I recall. I watched several videos, none of which seemed to show enough to form a completely valid opinion. IIRC, my take-away was that, at the time others were saying he was "safe" and should not have drawn, he was clearly being flanked by at least one black demonstrator and was IMHO in potential danger.
If I had been on the jury, I would have voted to acquit.