In Oklahoma, when you get a concealed weapon permit (which is a good idea and it’s pretty much automatic), you have to go in for some training about what is allowed and not allowed. They’ll train you that this kind of thing (that the pharmacist did) is not allowed legally, and that you will be legally responsible for murder if you do it.
Obviously this guy must not have gone through this kind of training, I would say.
So, the overwhelming majority of us in Oklahoma do know the difference between self-defense and murder and we simply wouldn’t do what that pharmicist did - while we WOULD defend ourselves, without a doubt, just as the D.A. said was perfectly fine (in what the pharmacist did - if he had stopped at that point).
If he did go through the training; he was either absent that day or he wasn’t listening.