Simply: because they live for the bodily desires and indulge themselves in carnal pleasures.
I read this (site is Hungarian, use translators).
What do you think? Do you agree with me?
This is really naive, if not disingenuous. Atheism is a form of Satanism, and atheists also enjoy narcissism, bad fortune of others (schadenfreude), and ego trips more. Atheism is socially obnoxious and deceptive.
Aleister Crowley and the Beatles followed their own law: "Do what thou wilt". Atheists never do any better than that.
Although not a Christian, Socrates was not an atheist and neither was Aristotle. Wise people are not so easily misled by delusions in this world as fools. They would both advise strongly against the sybaritic egoism and narcissism of atheists. It is very bad for the soul, and atheists, by their own dim lights, don't even have souls.
On the the other hand, atheists are more prone to despair and getting very lost in the cosmos and permanently evolved from monkeys and garbage. Even the little birds are doing better than atheists.
When you are dealing with atheists, you need to ask yourself, "Who am I dealing with here"? Dr. Faustus in a moron?