Since the main components of religion are mythology, dogma, and doctrines, it's kind of hard to focus on other thing irrational, but I'll give it a try.
That a supreme creator would sit and watch his creations suffer and die for thousands of years and then show himself a mer 2000 years ago, and show himself in a backwards desert part of the world to ignorant shepherds instead of a thriving civilization as China was at that time, is irrational!!
Agreed. Few actually believe such nonsense. This is using mythology, which I have asked you not to do.
By the way, it's also irrational to take the anthropomorphizing of God used in Hebrew literature literally, as God, by the nature of God, cannot have human qualities of any kind.
That a supreme creator would remain hidden, even from those who seek him, thereby creating thousands of varying beliefs all in direct conflict with each other is irrational!!
Agreed. But lots of factual concepts contradict each other, yet they still exist. (That was a horrible way of wording it, so I'll just ask this: what color is a rainbow?)
I say that God is only hidden from those who do not know where to look. It is a truth that you cannot obtain good answers if you don't ask the right questions and then honestly and vigorously seek the answers.
(BTW, this is the only point you've made that fits my criteria, and is a valid question which I cannot answer fully.)
That the wrong done by two people Adam and Eve, would carry over and effect each succeeding generation (the fall of man) is irrational!!! Thats like saying because my great grandfather committed crime, my sons sons, would have to pay for the crime.
But, just by the law of cause and effect, you would, depending on your great-grandfather's crime, still have to suffer the consequences IF your grandfather and father (and mothers) did nothing to fix them.
Again, you've used mythology.
By the way, have you heard the theory that the story of Adam and Eve was based on the "fall" from hunter-gathering societies to farming?
That a wold wide flood lasted a year, and a wooden boat carrying all the species of the planet, despite overwhelming scientific evidence, is irrational.
Again, we are agreed. Since nearly every culture has a flood story to tell, it is rational to conclude they are all based on SOMETHING that happened in real life, but none of the stories accurately recount what happened. There are many theories about what flood the various stories around the world is based on, but it is a general consensus that the Biblical flood story (derived from Babylonian flood myths) is based on the Black Sea deluge, which occured c.5600 B.C.E.
A third time, you use mythology.