As someone who grew up in a strongly red area and with beliefs in that vein, I know EXACTLY the kind of exclusion that the author is talking about to a painful degree. For anyone who wants to experience it, walk into any Reddit discussion and tell everyone you're a devout Christian and watch the pseudo intellectuals exercise their "openness." And yes it's true I'm far from the most religious person there is, and I st…
I don't recognise the prejudice against practical skills in my neck of the woods (CS dept in a UK university) but religious colleagues are quietly looked down upon and sometimes mocked. (Not that there are many of them.) I try as hard as I can not to judge such people myself but will admit to finding it hard to take someone seriously who believes in such stuff. Being able or unable to change a tyre doesn't come close…
It's a lot more to do with the culture one grows up with than the belief itself, and anything you learn at such a young age is difficult to shake loose of completely.
Personally, I used to be a strong Lutheran, I'd say I'm now 20% Lutheran and 80% agnostic, but even that has far less to do with me intellectually not recognizing my God and a lot more to do with frustrations over the behaviors of organized religions.
In short: For a lot of people that I know and myself, religion is far less believing that God is going to help you in some way (frankly, if you know your Bible, you know God's help tends to come in rather rough and leaves a lot of things broken so you don't really want it anyway) and lot more in believing that it's just a nicer universe to live in if you assume that you simply cease to exist at the point of death and there is nothing but...well, nothing awaiting you over that line.