I know what the pastor and leaders of my church feel towards carrying in church, and they are to a person all for it. There have been too many instances of people coming in and shooting congregants. There are no signs prohibiting carry of any kind, and I know that there are several LTC holders who carry every Sunday, myself included, as well as a few LEO's who are armed. We don't have an organized security team, but I do practice drawing while holding my bass, I face the doors to the church when we are playing so if anyone enters with evil on their mind, they may be surprised to see the bass player draw down on them. ( I don't know if my solid body bass will stop a bullet or not, but it will have to go through it to hit me.)
All of the stories listed in the article, (some going back to the 1880s) list disputes between church members with no mention of the legality of them even owning guns, much less the fact that these weren't a response to an attack. The left simply throws out incidences that have nothing to do with the church, but interpersonal issues between people.