All knowledge, once set it stone, becomes dogma.
It is taught to you by your grandparents, your parents, your elders, and your peers. You believe it because they do. “Hey, they survived this long, they obviously did something right.”
All these things, in youth, are faith. Our world is limited so we’re taught about what we don’t know.
To someone who believes in God, blaspheming against Him is a little like being struck by lightning when walking through a field. Both have bad consequences, but neither has been experienced personally. Both are considered risky and, though abstract, can cause real fear.
Krishnamurti once said: “You can take a piece of wood that you brought back from your garden, and each day present it with a flower. At the end of a month you will adore it, and the idea of not giving it an offering will be a sin.”
At the end of the day, this idol he talks about is still only wood, and wood is dead, not alive, unlike the garden it came from.
The only way to test religion is with your own body, by creating your own experience. It is a truth that is in the moment and that you can carry with you and that you know. It is not like the wood, because it is alive. It is in you.
But if you present it with a flower, it will die and belong to the past. It will be unchangeable. It will be a religion.