Its interesting how much Jewish theology (and, by extension, Christianity) overlaps (or owes to, depending on your point of view) the earlier writings of Zoroaster...the one parallel that readily comes to mind is the prophecy that the earth will be destroyed by a reign of fire from the sky....there are others but I'm too tired to look them up now...
which does not necessarily mean that these religions were willfully 'borrowing one from the other', but can also be read as indicating that God gave partial insights through time to different people along the way (Zoroasterism to Judaism to Christianity)...there is enough in common with these three religions that its an argument that has some plausibility...of course Zoroasterism is not well-known today because it was practically wiped out by Islam 1000+ years ago (only about 100,000 of its adherents still exist, mostly in India, where they fled to escape the Mohammedans, and, interestingly, they still see themselves as the keepers of the one "true religion"...)
Daniel was in Persia and is one of the more apocolyptic books of the Bible. I believe what they got came from Daniel's time there. He was very influential there. I never got your response to your anger at messengers. If you got saved in terms that you understand why does it matter who gave you the message.
They got wiped out so it's hard to say what they believed. It's a bit like Nostradamus. Stuff just appears that is attributed to him.