The idea of a god that dies and is reborn is not new by any measure, gods from all cultures went through literal or metaphorical death and rebirth.
There are indeed such stories but they inherently differ from resurrection is markedly different ways. Resurrection is a Jewish idea that happens to (all) God's
peopleat the end of the age, not being reborn as before but coming through death and out the other side. In Christianity that is then said to have already happened to Jesus on Easter Morning. The Christian resurrection is essentially about a human/all humans coming through death and out the other side, defeating death, in what is intrisinsically a once-for-all event. Not about a god cyclically dying and being reborn.
The Trinity is pre-dated by ideas from dozens of different cultures about triple gods or three aspects of a single god.
I dare say, though to what extent they look like the Christian version...
The idea of monotheism itself pre-dated Judaism and Christianity to almost the 14th century BC with Akhenaten and Atenism in which the Aten (sun disc) was the sole god and Pharaoh his intermediary on Earth, similar to the modern papacy.
There are only so many ideas around. It's not at all surprising that there are some other instances of monotheism in part or whole. Though not many are a single creator God of all that is.
The story of Isis, Osiris, and Horus mirrors closely the life of Jesus.
The similarities are usually grossly overstated.
The idea of absolute evil was brought about by Zoroastrianism, which pre-dates Judaism and Christianity.
The idea of evil in some sense is a pretty basic idea. Though it's hard to tell in many cases with Zoroastrianism what is original and what is later accumulation.
Several wise men (called magi) journeyed to herald the birth of the savior of the world in Zoroastrian belief, [FONT=Verdana,Arial,Helvetica]Saoshyant. [/FONT]
And? There are only so many narrative themes out there. Given the number in the bible, and the enormous number in other cultures, it's a statistical certainity that some similar ones will be found simply by chance.
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[FONT=Verdana,Arial,Helvetica]The church adopted many pagan practices and changed them to ease conversion of native populations to Christianity[/FONT]
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[FONT=Verdana,Arial,Helvetica]That's absolutely true, and not inappropriate. The Judeo/Christian story is of God working with and within a fallen creation to put it right. That Christians should subvert some pagan symbols and dates in that process is entirely appropriate. But the instances of this are often completely overstated, or simply pick the wrong things, or ignore the substance of the idea and look at a few surface similarities. A bat looks a bit like a bird, but is completely unrelated.[/FONT]