One more theoretical base to deny existence of God is Darwin's theory of evolution. I will highlight its drawbacks:
1. It supposes living individual is comprised only of body, NO MIND, NO DESIRES, NO HAPPINESS, NO FEELINGS. How's that?
Reason: It is based on only physical body structure and nothing else.
All of us believed it??
2. It is based on serialization of of body structure from simple to complex. Great! We have simple iron pin to very complex iron structure. But between pin and complex iron structure, there is no evolution. Both of them have the same origin : earth's crust. Why then to insist that complex living structures evolved from simpler ones. Why is not possible that they could be originated from same source – God?
3. Darwin says that simpler structure were of earlier age and complex are of later age. Now a days many species are on the verge of becoming extinct and some might have become extinct recently. Say for example Tiger. Imagine a later date after millions of years. Tiger's fossils would be millions of year old. Then there will be argument that Man of that period evolved from Tiger of today.
4. The argument of fossil age that supports this theory assume that the layers of earth are intact from the beginning of life on the earth. But would Geological upheaval keep these layers intact over billions of years? Impossible!
5. Then is there any animal anywhere near to mankind? No. Mankind is exploring space while monkeys which are nearest to mankind are still exploring forests!! They cant built beautiful houses, they don't have clothing and they not have even bullock-cart to travel. Why there is such tremendous difference in brain capabilities of mankind on one side and rest animals on the other side? Why there is no gradual evolution of brain capabilities? Drawin has no answer!
Hindu explains God has created or released this world and only mankind has given right to action (Actions that decide your future lives) and therefore the corresponding brain capabilities. Other species don't have right to action. They are there to bear the outcomes of the actions performed in human form. And hence no brain capabilities.