It takes only a single verse to prove just how wrong all of that is.
Zec 12:1 The burden of the word of the LORD concerning Israel: Thus declares the LORD, who stretched out the heavens and founded the earth and formed the spirit of man within him:
The spirit of man that God forms within him is not dead. That anyone would really think otherwise is blasphemy.
Let's try to listen to what the apostle Paul tells us in Romans 7.Romans 7:17 Now then it is no more I that do it, but sin that dwelleth in me.
18 For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
19 For the good that I would I do not: but the evil which I would not, that I do.
20 Now if I do that I would not, it is no more I that do it, but sin that dwelleth in me.
Do you believe what Paul says there concerning him, that is, mankind? That in him dwelleth sin and that in him dwelleth no good?
And what do we see in that? That mankind, Adam's kind, Paul, me, and you, are flesh, that is, sin dwelleth therein, as such where dwelleth no good thing. That is no less, the flesh in its corrupt state. Such was not in the beginning, before Adam sinned. For sin was not and dwelleth not in unfallen Adam (in his flesh). But that was what became of the flesh nature of man because of Adam's offense. Man's flesh was corrupted, in that, in it sin dwells, making mankind (infants and all) unclean and impure, having such a corrupted nature (in the flesh). And so, goes the posterity of Adam, for what man can bring a clean and pure thing out of an unclean and impure?
Now, man is flesh and spirit. I have told you of the flesh. What about the spirit?
You said "The spirit of man that God forms within him is not dead." Of course. But the spirit that God forms is the spirit (of the man), which together with the flesh, make up the man. It is what makes the man be a living soul. While God is said to be the one who forms it within him, it is in the sense of creation, not of giving the person's character.
Mankind is of a living spirit and flesh, flesh where sin makes its dwelling the very moment of its creation. This make up of mankind, the kind of fallen Adam, as a whole, is one of an unclean, impure, and corrupted (with sin) nature, that is, the fallen human nature. This is what every human being is, that is, of the seed of fallen Adam. Man, without exception, and unless made clean, pure, and holy, is separate and can not be with the pure and holy God.
From birth, each man grows to develop physically and spiritually. And in the course of that, man is exposed to the world and develops his person, his character. And what can be more than influential to him regarding that, but his flesh? That being the fact, tells us why the natural man was and is found to be sinful, that every imagination of the thoughts of his heart was only evil continually, for sin dwelleth in his flesh.
That is the sad truth, but the truth nonetheless, concerning mankind, the kind of Adam. That is what resulted from Adam's offense.
Of course, the good news is God's salvation in Jesus Christ.Romans 7:24 O wretched man that I am! who shall deliver me from the body of this death?
25 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.