[~Mr. Self Destruct~]

Let's keep in mind this is a meta-analysis. With a significant amount of research findings included. It's a correlative, not a causative, effect, that's being concluded from its findings.
It's also not respresentative of critical thinking skills to count your own personal examples or incredulity as something to be of any evidential weight.
I myself can't say I'm surprised by the results, albeit there exists a dogma known as "Atheism +" in this day an age that calls for almost as much doctrinal behaviour as a religion would.