Unbelievable ? Precisely because the credulous are satisfied with such an abysmally low level of evidence - close to, often actually zero. And inconsistently satisfied : so a zero-evidence claim which supports their own position is accepted, but a shed load of evidence demonstrating the contrary is rejected.
Example 1 : God made woman from the rib of a man.
Example 2 : Jesus was the son of God, and God at the same time.
Example 3 : Mohammed the illiterate receives the word of god to be committed to text.
Example 4 : Hopping-gurus bouncing round India is conducive to holiness.
Organised religion hitherto is largely the promotion and celebration of fundamental irrationality. It has turned credulity into a virtue, and turned human curiosity and scepticism into a crime.