Watching it, the church members appear to be trying to talk the shooter down. The shooter then escalates, shooting two, the church member draws and shoots, taking the shooter down. Even more interesting was how many additional church members had drawn their firearms and were advancing on the location of the shooter within seconds. These were people who were ready to protect the others in the church.
Lessons sometimes are learned by ultimate sacrifice. There are those who are much more knowledgeable than me to “armchair” and do post-analysis. I hope all churches that are armed take precaution and tighten up.