But there is value in society being a as a glue that binds families and individuals together. That society can manifest itself in a Church, such as when many people lived near their own parish and attended that parish with all of their neighbors. We've lose that with transiency.
Europe is less transient, also less religious, yet these mass shootings don't happen there. I think it's because, generally speaking, they still live within the context of a society with one another rather than as isolated, selfish, rugged individualist.