Jews teach that G-d had a purpose for each and every race, each and every people. Every national group has a reason to exist and a destiny, and Jews teach that their point of view is not necessarily unique.
Jews don't believe we are special. We might have a purpose in life, but it is no more important than the purpose of another ethnic group that worships another god or that we are more enlightened than individuals who have no religion. Like a tapestry, every thread is important, not just the ones that might play an apparently prominent part in the pattern. You start pulling at one, they all come apart. They rely on one another.
The Jewish mythos demonstrates the earliest beliefs about the place the Hebrews played on the world stage, but it is only the most ancient and basic of understandings. It is very old, and very primitive. The Jewish understanding has changed dramatically for the most part, and unlike Christians who try to keep the primitive Word as valid today as it was thousands of years ago, Jewish thought and theology has evolved far past the mythology you are considering.
Even the terms "God" and "monotheism" are highly primitive concepts of the Deity compared to what the Jews connect to in our day. While Christians may keep rehashing the relic of the Bible, the Jews have moved on in an increasing manner (which is why you can have Torah-observant humanistic or atheist Jews). Jewish theology has evolved far from the burning bush, Old Man in the Sky images so many debate about here. It is highly developed and far beyond anything found in Christianity. For many Jews, G-d is not even personal or even transcends existence while at the same time being the definition of it. Existence of G-d and belief of G-d are often irrelevant issues to the most religious and observant Jew as well.
You have to move past the Hebrew Scriptures, into the Midrash and Talmud and far beyond to understand where Jews are today. For us G-d also evolves, changes, learns, becomes better at being G-d along with all the other dimensions I have mentioned above. The monotheism in the Scriptures is only mythologically reflected in its most primary terms. Jews have moved past that. What you find in the Bible is for puppies. The concepts you have to have to understand Judaism and its current understandings about G-d are for much mature and bigger dogs.
One last word: don't expect it to be perfect either or claims of it being the ultimate truth. Judaism has moved past even those ways of looking at things.