You might need a separate thread. I read the beginning but not all the studies. It will take some time.
Religion has a lot to do with data. For instance, in my view, thinking of others is most important to my mental health. My definition of who I am and my happiness BEGINS with how I fit into society and serve others. In secular thought, I’m supposed to take care of me first in order to help others. Obviously, some self-care is needed but it is best fit it around the needs of others for good mental health.
Take another concept: self-confidence. To be unconfident is actually very selfish. To focus on yourself and your failings is not going to help others, and may in fact make you blind to the troubles of others. Humility is good, but unconfidence is bad (and selfish). So a religious person can never find common ground with a secular person because the parameters are so different.