Lorenzo,
You are speaking of the New Testament.
While Jews never expected their Scriptures to be read independent of their religion, it should be interesting to note the differences on some of the points you mention:
1. The Hebrew Scriotures were written to be understood.
2. Revelations from God are intended to be public, including written ones.
3. Secret codes or hidden meanings in messages violate the intention of public revelation.
One of the most significant reasons Jews did not accept Jesus as the Messiah was his repeated habit of teaching in parables specifically designed to hide revelations from direct public consumption. According to Jewish Law, prophets had to be like Moses to be authentic who himself never spoke in such riddles. Secondly Jesus' own disciples claimed that the Jewish texts were filled with hidden meanings kept secret from the Jews, and again like Moses' own works, written revelations had to be for general public consumption, not for future generations that would consist of people separated from Israel.
However it is curious that Christians make pledge to a text that is not meant for everybody to understand while Jews, though admitting it often takes a step into our culture to comprehend, believe the underlying message in Scripture can be accessible to anyone, even Gentiles despite the fact that the texts were not prepared for their immediate comprehension.