Because Atheists believes in fact, and religion have a lot of weird things that cant be scientificaly proved.
Im religious and i personally think that religion is illogical to me, but i still believes in it because there is still no prove that god exists or not, and most of religion ways is really about good things to do.
However, atheists DON'T believe in fact. If they believe in the things of science, most of science is theory, which is fiction. It is only engineering that is near fact.
Religious writings of the Bible are eye witness accounts over the years. The nation of Israel is a strong nation, perhaps the longest lasting nation of all. The tradition of the people of Israel is that the eye witness accounts of the Bible are fact.
In addition, Science has proven that God exists. Of course, anyone can deny any proof. But consider this quote from
https://bitcointalksearch.org/topic/m.13397782:
You have certainly heard of the Theory of Relativity and the Big Bang Theory. Theory might be something that is a necessary part of discovering scientific fact. But until the theory is proven true, it is fiction. In the case of science, it is science fiction. This brings us to Newton's 3rd Law.
For every action there is an equal and opposite reaction. This is a law, not a theory. Call it cause and effect... perhaps not exactly the same, but similar.
Every electron in your brain moves because it was acted upon by other electrons, or chemicals, or something else that causes it to move. When this electron moves, it causes other electrons to move, or other chemical reactions that cause you to think the way you do.
The point? EVERYTHING IN NATURE AND THE WHOLE UNIVERSE acts because something acted on it. And the thing(s) that acted on it were acted upon by other things that caused it to act that way. In other words, something caused something to move, which caused something else to move, which caused something else to move, which caused something else to move, etc., etc., so that everything acts the way it does in the whole universe because something, or many somethings, caused them all to act that way. Nothing - ABSOLUTELY NOTHING - in the whole universe ever has acted randomly. Not even your free will.
Newton's 3rd Law. That's it in detail. And the Thing that could cause such complex activities in the whole universe through cause and effect, action and reaction, must be very great. It must have the knowledge and ability to create the human brain and mind through thousands of years worth of cause and effect, right down to the present. Why? Because nothing acts any other way than it was caused to act the way it does... even the typing of this post.
Especially the
bolded part, above.