You said Christianity shares its answer about the human condition with Judaism. The Christian answer is essentially Pauline. So what does Christianity's account of original sin and so forth have to do with Judaism?
I've read Grey's "Straw Dogs." It's a great book, but it's explicitly opposed to secular humanism, although the book is certainly atheistic.
Secular humanism doesn't entail evolutionary psychology or genetic reductionism. Not even biology does so. That, then, would be a strawman objection.
This would be an interesting topic for a debate, though: Which side has the more suitable view of human nature, Christians or secularists?
If you'd like to debate something along these lines by email, with a view to my posting the exchange on Medium, you can reach me via the contact form on my blog (so you don't have to post your email address on the web). See the first link below and scroll down on the right just below the "About the Author" section.
The second link is to a previous debate I had with another Medium author, on secular versus religious enlightenment.