Religion has been as part of society as far as its beginnings. All ancient human civilization had some sort of belief in a God or the transcendent. Beliefs have always been an issue within any human society. The belief of the transcendent gives humans a chance or hope for eternal happiness for people who abide their beliefs.
But through out history, different religions and beliefs emerged which gives rise to the inconsistency. There are numerous differences between religions: one versus many gods, personal versus impersonal gods, personal survival of believers versus no survival of believers, moral codes, religious life, etc. As observable in human history, though religions often offer some sort heaven it often paradoxically entails conflicts and controversies. And despite the fact that religions supposedly gives people a sense of what's right or wrong, atrocities have been committed in the name of religion; the hundred years war, the inquisition, jihad, ethnical cleansings etc...
And amidst the variety of beliefs that populate contemporary society, one cannot help to think how to take in hand the overabundance of truths that sometimes overlaps, dissent, and eventually oppose each other.
There are three stances one can take. First is to (1) treat all religions as valid and true (pluralism). Another way is to (2) view beliefs in way that some are right and some are wrong (exclusivism). Finally, one can also (3) think about all religions as false (atheism).
Let me take into consideration the third stance first. By arguing that all religious beliefs are false, it also means arguing that God or any form of the transcendent does not exist. And by arguing this, means rejecting all of the theistic theses that were formulated in the history of man. And this is the part where the catholic philosopher's shear my head off,