Do they? Maybe they are just disappointed with religion. Think about the conflicts religion made and its millions of casualties. And these religions have no factual basis but what they called faith. The true religion should be humanity and earth. Humanity and Earth should be the only cause worth dying for.
The complete definition of the word
religion, and the way people who supposedly don't have a religion act, shows that there are a whole lot more religious people among the so-called unreligious/non-religious than what we think. They only want to separate themselves from religion. But they do it in such a
religious way, that they could be classified, jointly, as a religion of unreligion/non-religion.
When you look at the true religious attitude of people who make conflicts in the world, you see that they have a different "religion" than the one they proclaimed. Look at the Crusades, for example. The Crusaders were not following the principles of the New Testament that Jesus, Saint Paul, and others laid down. So, were they Christians, really? What really was their religion?
Consider Hitler and his quasi-occultic religious views. But his greatest religious views were Third Reich views. At least that is the way he and his group
religiously acted. And they were so
religious at what they did, that they almost took over the world... at least in appearance. Twelve to twenty million dead.
And what about Stalin? Formally he was a Jew, or at least of Jewish heritage. But the Jews aren't trying to take over the world like this. They are simply trying to live. You can't lump a few fanatical Jewish leaders together with all the simple, humble Jews who live around the world. There are fanatics all over the place, not only among the Jews. Sixty million to 100 million dead... both Jew and Christian.
And what about Genghis Khan and his 12 million slaughtered? Yet, he allowed many religions of many kinds to be practiced in his lands that he conquered. His conquering brought a certain kind of stability to many of these lands. He was formally shamanistic, but what was his real religion that caused him to conquer and kill so many?
What about faith? Nobody knows for even a second into the future what will happen,
for a fact. We all live by faith somewhat, although many of us don't know what we have faith in. Faith is part of life.
People really need to rethink what they mean by religion, and how deeply religion "infiltrates" us all. Atheists simply don't know what they are hating if they think that they hate religion.