After all, there are Christians who believe in any number of variations on this theme, and guess what, in the end analysis, it means zip because JESUS CHRIST is really all that matters. Eveything else is but a shadow.
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The reason one is supposed to believe that Yeshua bin Yacob, aka Jesus Christ, was the Son of God and the Savior of Mankind is that his story is found in the Bible, which declares itself to be the Word of God. Jesus Himself, though allegedly capable of returning from the dead, has not done so recently, and despite his religious heritage, which gave major importance to the Written Word, Himself wrote not an account, nor a paragraph, nor a sentence nor one word.
If any part of the Bible is not true, then all of it is suspect, and subject to actual scholarly analysis, which is not the same as the baloney known as "Bible studies", which merely analyze HOW it is true. Stating that Jesus drank grape juice rather than wine is one example of this sort of silliness.
As for a majority of Americans believing that the world was created around 4000 years ago, I personally did not poll them, but I did read this in a popular magazine. I shall amend this by saying that far too many believe the "young Earth" theory to be true.
It was a Church of England priest and 'scholar' who in fact did add up the ages of all the lineages of the begats mentioned in the Bible and arrived at the first man (Adam) having been created in the year 4004 BC on a Thursday afternoon, I believe. So that would have been not 4000 years ago, but 6011 years ago, give or take a year. Not that it matters, because it is patent malarkey.
In any event, the number of people who believe Biblical nonsense surely causes many young Americans from becoming scientists, though probably not so many as an aversion to mathematics, which is at least partly due to the fact that people who are really enthusiastic about math can find far more gainful employment and higher status in jobs outside the teaching occupation. My daughter did not meet one adequate math teacher in 14 years of education, nor did I meet even one in high school, either.