Those quotations exclude mature, rational, automatous (rationally sovereign and self-determining) individuals from the Christian ideal.

If you just want biblical references for the sinfulness of the rejection of Christianity, they're easily provided. See, for example, Mark 16:16, John 3:18, Heb. 3:19; 11:6, 2 Thess. 1:8-9.

In many cases, the NT equates unbelief with the sins that God will condemn, since unbelief was seen as the precondition of wickedness. This is so in John 3:36, "Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him." Here, the opposite of believing in the Son seems to be disobedience to the Son, which is condemnable. See also Romans 1:18-19, 28-30.

I'm aware there are different kinds of Christians. I've written dozens and dozens of articles on that religion. This article simplifies, but I usually specify that the kind of Christianity that most swiftly succumbs to philosophical scrutiny is the exoteric, literalistic kind.

It's no caricature, of course. Plenty of Christians are far too sanctimonious about their creeds and theologies. They're nowhere near humble or wise enough. And they're typically the loudest voices in the room, as per the Dunning-Kruger effect.

Concidentally, I've recently written something on Dostoevsky's Notes from the Underground, which goes into your personal attack on the godless mentality.