believe it or not all of the follwing are Scripture vv;
No son of man may die for another's sins
No one has ever gone up to heaven
There is only One Immortal
He who seeks to save his soul will lose it

"The best cure for Christianity is reading the Bible"

Just read a commentary about Darwin's conversion to non believer. He was a Christian throughout his famous journey and always looked for ways to put what he was seeing into his creation views. After returning to England and putting things together it became really difficult to continue justifying his beliefs. When it came to plants, "...Darwin wanted to counter the idea of some hapless God having to busy himself with the landscaping of the entire earth...". So many things about religion/gods, when one thinks about them, are pretty stupid.

I don’t want to think humanity was stupid, we were just curious, and with the lack of knowledge we invented “GOD” I would like to believe that with the access we now have to knowledge now we will begin to leave behind our superstition

I’ve long assumed those closer to ‘such times’ had a far - FAR better excuse for believing in such stuff than anyone alive today.. So if there be Dummies ..we’re (in the US at least) waist deep in them ~

Hard for us to get into the heads of people from a time and culture so far removed from our own. But to piggyback off of what TheMiddleWay said about ignorance being different from stupidity, it seems to me that in ancient times inquisative minds seeking answers to unkbowable things would find religion very attractive, indeed, as it promises answers to life's mysteries. False promises, to be clear, but still promises.
As science has brought people an ever larger base of empirical knowledge, the useful role for religion would naturally shrink. (God of the gaps). Clinging stubbornly to religion now in the face of mountains of facts that refute many of its claims, ...well THAT is stupid. That is modern day religious life. But then, fear is a powerful dumbing-down agent. Fear of punishment, fear of rejection, fear of loss of community, these all can lead otherwise competent people to abandon reason.

I would not presume people back then were easily tricked by slight of hand magic tricks

Not "stupid," at all, just trying to make sense of experience in a way that avoided the idea that it was all a result of randomness.

Stupid? No. Stone Age/Bronze Age/Iron Age people weren’t stupid. It takes intelligence to make something out of nothing. Look at Knossos, the pyramids at Cheops, the solar observatory in Chichen Itza, Stonehenge.... without advanced science they created these. That’s beyond hunter gathers development of sophisticated stone tools. No. They weren’t stupid. What they didn’t possess is science/logic/math. These are cultural developments that took centuries to develop. It’s with that backdrop that religion can be seen as erroneous; as set upon fallacious premises.

Oh I don't have to imagine how stupidity is inherent to most humans, including those who think nature and science are spiritual revelations.

I don't care what her mother and father says that Mary Rosenberg is a whore She's been sneaking about with that Joey Christ .

No more stupid than believing a society can be efficiently organised and administered by elite businessmen of self-interest!