Why can't all religion be true? Religions differ only in details, but behind the details all religious stories/scriptures are same. What is new becomes old/decadent in time which is again made new by God Almighty. This would mean God’s role is only to renew when situation necessitates, on wholesale basis, which would mean that there is no intervention in the case of individuals and in each individual use of free-will.
This is in harmony even with two opposing isms—Theism and Atheism: Theism says “From the more comes the less,” and atheism says “from the less comes the more” [as implied by Natural Selection which is “the process ultimately capable of generating complexity out of simplicity,” God Delusion, Richard Dwakins]. Thus both agree that something comes from something. If something comes from something, it has always been true, and it has always been there—infinite into the past and infinite into the future.
It is in harmony with what we see in the nature. Nature has a rhythm and things happen in cycles such as cycle of night and day, cycle of season, carbon cycle, nitrogen cycle… etc. We also see the principles of such cycles reflected around us: plants grow and die leaving seeds that ensure new lives are reborn continuously. There are cycles happening within us too—cells in our bodies become old and are being replaced with new ones at regular intervals! Even when we sleep at night, we typically go through several sleep cycles. And each one of these cycles consists of 4 different stages of sleep—awake, light sleep, deep sleep and REM sleep. Those cycles show A MUTUAL INTERDEPENDENCE and purpose. For example, each season emerges from the previous and gently turns into the next. Winter snows feed the ground for Spring’s blossoms. Summer’s heat ripens the plants for Fall’s harvest. While in day, we desire for night and vice versa. While in hot Summer we wish it was Fall. While in cold Winter we wish it was Spring. This is true of the greater cycle of New World and old world alternating on earth.