Belief is not knowledge.

One knows - not believe - that one plus one equals two.
One believes - not know - that God exists.

Those who claim they know or prove that God exists are not religious, just delusional, demonstrating lack of faith. Whatever "proof" they show, they demonstrate that they found some of God's doodoo, not God itself.

People who believe that the Revealed Books (Bible, Koran) are all about literal truths show a lack of faith and thus not religious.

The study object of Physical Science is the Secondary cause, not the Primary cause - cause of Secondary cause and cause of itself. Religion, especially revealed religion such as Christianity or Islam, are attempts to connect the Primary cause to the Secondary.

The atheists who claim that Reason is their only guide had, have and will be hitting many walls. In mathematics, the only area where Man is a virtual God - any object can be created in the mathematical world - the Godel theorem states that there will always be a question the answer to which forces an introduction of another axiom to the previous set of axioms. Axioms are just guesses as to what may be evidently true. How do axioms come about? Through divine anguish, divine intuition.

Bertrand Russel, an atheist, tried - with many others - to come up the Mathematics to end all Mathematics and failed. Godel showed that they were on a fool's errand.

A corollary to Godel's theorem is the Church's theorem: one cannot build a mathematical robot - which cranks out theorem after theorem - which can provide all possible mathematical knowledge. Such robots have been built and some have came up with non-trivial theorems but one has no illusion that such machines are the ultimate in mathematical reason.

One finds parallel dilemmas in Physical Science, the laws that we know currently are just postulates: mathematical representations which fit - within current range of perception - our measure of physical phenomena. To think that there are only 4 forces (gravity, electricity, strong, weak) are delusions given that - currently - no one has a clue as to the internal structure of the electron (a relatively massive particle compared to, say, the neutrino).

How do postulates come about? Through divine anguish, divine intuition.

The atheist is no closer - and not approaching any faster - than the religious faithful to the Primary Cause.