Atheism is the disbelief in any theistic deity or deities, primarily Allah (what you would call God). The definition in itself is quite contradictory, as it proves the existence of Allah. If Allah was not present, there would be no reason to disbelieve and certainty about there being no creator is not even a discussion (just as every human being in their right mind knows for certain Naruto does not exist in the real world).
Moreover, to believe that every thing* is created and ultimately will reach it's demise (the universe included) and to state that the universe came to be out of nothing is... well, to take a word out of an atheist's book to someone who believes in Allah, it is mere fairy tale and imagination. This is not reasonably deduced nor induced. This is not a logical conclusion. Even if the Law of Matter is in place, this still does not change the fact that without the universe, matter does not exist. It is a fact that the universe was created. However, that is for another day.
To disbelieve in Allah due to this fault in the faculty of reason is not enough a reason to reject The Creator. You could argue a second point - the people following these religions. Again, this is problematic. No human being is absolutely perfect. This quality belongs to Allah (God) alone. You can have perfect guidance, but man will still find ways around it. You would have to point fingers at what the religion teaches, not those who practice it.
If you have not created yourself, nor the earth itself, nor the moon itself, nor the sun itself nor anything in creation, then any human being with a sound mind can deduce that something must have created it. To state otherwise would have to entail evidence behind it - in which there is not an iota of such. Nothing just comes into creation (yes, not even the energy balls in space that appear and reappear out of observation in space). Nothing. Therefore, if you disbelieve in The Creator, then chances are that you are not properly utilizing your intellect and knowledge given to you.
* According to the physics definition of the word "thing", it applies to the context within the universe.