I do think it's important not to confuse our capacity/tendency to be religious in some form with a *particular* sort of religion's conditions or commands or even particular perceptions/claims about 'human nature.'
Both people in the dominant religions and atheists who like to lump all 'Religion' together into a single 'thing' tend to do this, but this study doesn't necessarily study *those particular claims.*
Not everyone believes in this 'fallen human nature' nor in all-controlling-all-judging, manipulative-sounding but distant conceptions of an externalized 'One God,' with all problems in the world some failure of those humans to 'submit' to some presumptive authority claimed by other humans to come from there. Not even all monotheists really buy into that, though they may share the same devotions with some who do.
(And polytheism and other beliefs aren't at the core just 'the same thing with more of the same,' though of course they aren't 'proof' against similar behavior, either. Nonetheless the inherent presumptions aren't the same. Nor are the challenges: karma without compassion can lead to callousness, for instance, or in some cases, too much passivity, even victim-blaming at times. )
But in any case, the *forms* that religions may take, especially as we work on getting the bugs out of this thing we call 'civilization,' aren't necessarily demanded by the *capacity* for religiousness, spirituality, mysticism, and the rest.
Mystics, and by that, as Les rightly clarifies, those who are *experience-focused* may have vastly different forms of belief and even come to different conclusions, but when *we* get together, we actually do share common experiences and even frames of reference which may not be implied by what people who come up with or seek to enforce *doctrine* say.
The language of doctrines (And social controls) tend to try to *define,* *draw boundaries,* ...divide, exclude.... Which isn't to say that's *always bad,* but we forget what these kinds of words and processes *mean.*
Between people of various persuasions about religion, I think it's better if everyone sent out their mystics, shamans, bards, and storytellers. Bringing stuff *together* is what that sort of business is about. (And the atheists ought to send their Sagans, not their Hitchenses.
The former really knew the knowledge was in no way incompatible with the *wonder.* )
All this study really tells us is that it's something that needs dealing with. Can't be banished, displaced, or put in a box or a cage, cause it's *part of people.*
What we *do* with that is up to us.