I'll add to this as I can, but you can start with this blog post I wrote a while back.
I'm not certain how well written it is or if it is viable - the only comment I got on it was from a guy who knows very little about scripture and christianity =p
I do like studying world religions. Islam is not mentioned in this because it is not an ancient world religion and, in fact, adopted heavily from Judaic history in its religious formation (again, Islam was first introduced around 600 c.e - 400 years before the crusades began).
All Those Roads
Zoroastrianism - Wikipedia
Lists the tenets of zoroastrianism as belief in one universal and transcendental God, the uncreated creator to whome all worship is directed.
Ahura Mazda's creation is truth and order.
Active participation in life is essential to ensure happiness and to keep "chaos at bay" - meaning actively participating in good thoughts, good words, and good deeds (sounds a lot like something christianity teaches, though not worded quite the same way)
Ahura Mazda will ultimately prevail, at which point the universe will undergo a cosmic renovation and time will end. At the end of time, a savior figure will bring about a final renovation of the world, in which the dead will be revived.
History of Zoroastrianism
This site gives a very brief history of Zoroastrianism. I guess I'm more prone to fall in line with conservative zoroastrians in that I think there was some of this theology alive and well in the Babylonian Empire at the time of Israel's exile there (time of Daniel). Like I say in my post, this is when apocalyptic writings are first introduced and it's also about this time that I think the idea of a savior is introduced into hebrew writings... even though the wording in the pentateuch is very "plural" when referring to God.
Overall, Zoroastrianism more closely resembles Christianity out of any other world religion. I realize this doesn't make it true, but it still holds that Judaism probably learned a lot from it. And given my post, I think you'll understand where I go from there =p
I guess something else I should add so you get a better idea of why I'm going here with this -
I strongly believe that the location of Israel is strategic. For such a small and "insignificant" nation, it has been exposed to the greatest civilizations of histroy...and they all knew about Israel. I strongly believe that God chose this spot for Israel so that he could display for the rest of the world what he was all about through his covenant with Israel. And I think that is what actually happened.
However, I also think putting Israel in that location also provided Israel with exposure to other peoples and their beliefs. Especially during Exile - first with Egypt, several times with Babylon, and again with Persia. The nature of Judaism never really changed - it maintained itself when surrounded by Asher, Baal, Ra, and Isis. However, it still managed to pick up some crucial elements...and I don't think it was by accident.