The intellectual insecurity of the atheist and where it eventually leads...

The atheist is crippled by an intellectual insecurity. He must strive continually to convince others - and even himself - that God does not exist. But he is always haunted by the fear that he has not really banished the presence or power of the Divine Other. This canker of insecurity, which gnaws at his heart unceasingly, manifests itself in the incessant need to propagandize against belief in God.

For example Richard Dawkins, an atheist who authored "The God Delusion," devotes much if not most of his time attempting to convince others that belief in God is even dangerous (see here). This charge is most ironic since, as Fr. Vincent Miceli, S.J., reminds us, "When man becomes his own absolute center, then God becomes his hell, because God sets limits to man's greatness. But once having attained autoerotic sovereignty, a monstrous metamorphosis takes place in atheist man. He begins to feed on his fellow men, for they now are his hell, threatening to rob him of his freedom. When God is rejected because he is seen as man's hell, then man, whom God loves, suffers the same fate and for the same reason. There is a frightening resemblance between the atheist humanist as a cell of society and a malignantly cancerous cell in the human body. Both cells have thrown off any service of subordination to the health of the communities in which they thrive. They act and grow according to their own uncontrolled ravenous appetites feeding parasitically on the whole organism. As runaway cells they invade and destroy every healthy cell in the body until they extinguish life and speed to completion the total disintegration of the unity of the body. Atheistic humanism is a psychic cancer. It shares two major characteristics with physical cancer. Both these human cancers arise from the arbitrary rebellion of a subordinate cell against the established social harmony of the whole. Secondly, both these cancerous rebellions are metastatic and messianic in their aggression to the death against organism and community." (The Gods of Atheism, pp. 463-464).

Gilbert Keith Chesterton reminded us that when man denies God he does not believe in nothing. Rather he will believe in anything. Moreover, he will not do nothing but as a fanatic he will do anything:

"There are men who will ruin themselves and ruin their civilization if they may ruin also this old fantastic tale. This is the last and most astounding fact about this faith; that its enemies will use any weapon against it, the sword that cuts their own fingers, and the firebrands that burn their own homes...He [the atheist fanatic who is crippled by his own insecurity] sacrifices the very existence of humanity to the non-existence of God. He offers his victims not to the altar, but merely to assert the idleness of the altar and the emptiness of the throne. He is ready to ruin even that primary ethic by which all things live, for his strange and eternal vengeance upon some one who never lived at all." (Orthodoxy, pp. 238-239).

Atheistic fanatics have a long history of unmatched violence. Today, fanatical rhetoric from atheist fanatics has resulted in actual violence against the Church as well as calls for such violence. See here.

God is not the delusion. The myth of the atheistic humanist who truly values reason is the real delusion.