Some people are staunch Atheist unwilling to listen, think or feel that be suggestive of existence of God. If any one is Atheist because of thoughts and reasons then he must be open to new ideas. He may be at the most Agnostic. Why these people are Orthodox Atheist?
There are two reasons for this emotionally surcharged Atheism:
1-Forbidden Fruit: These people have tasted the forbidden fruit of adultery. They have sex before and outside marriage. If they accept God then they must be chaste. Thus this un-chastity keeps them Atheist lifelong but they cherish a hope in their hearts to repent at moment of death and to get salvation.
2-Arrogance: The Islam is extension of Judaism and Christianity. It presents same system of thought. Hence it is intellectual contradiction in believing Moses and refusing Jesus and Mohammad or believing Moses and Jesus and refusing Mohammad. Those Jews and Christians who could not bear this contradiction and did not accept Islam because of arrogance and racism turned Atheist and go on secretly believing their original religion in their hearts and hoping for salvation.
If one lives a chaste and good life then one is sure to feel God’s subtle interaction in his day-to-day life.