There are different levels of observance such as:
Reformed - Which is the most liberal. Services are a mixture of English and Hebrew (may vary by congregation) and they usually hold only Sabbath (Friday night and Saturday morning) services, plus holidays. Few members keep Kosher.
Conservative - Middle of the road. May hold daily morning services. Services are predominately in Hebrew with a sprinkling of English for those that don't read Hebrew.
Women have equal power to participate and be ordained Rabbis as men in Reformed and Conservative congregations.
Orthodox - Follows the rules more closely. Most keep kosher and the men engage in daily prayers and wear kipot (the little beanies). They may be Modern Orthodox with short hair but still with the Pais (curlyque sideburns), or they may be more traditional. The Hasidic movement is on the right wing end of Judaism, and within the Hasidic movement there are even more fundamental groups. Women usually sit separately from the men and men do not ever touch a woman that isn't their wife, or their wife if she is unclean (period +7 days), not even a handshake.
There are many segments of each of the above. Like all religious organizations, there's always someone who wants to do things a bit different.
The basics remain the same regardless of level of observancy:
- There is 1 G-d and only 1.
- Jesus was a mortal and not the son of G-d. The very thought that he might be violates the most basic tenant, there is one and only G-d.
- There is no Hell.
- There isn't really a Heaven either, at least not in the Christian sense, though G-d lives in Heaven.
- You can be forgiven just by asking and being repentent.
- If you are born a Jew, you are always a Jew whether you observe or not.
- They do not prostelize and discourage gentiles from converting. It's a long process to earn the right to convert. The more fundamental groups may not recognize those that are converted by less observant groups but, to the best of my knowledge, there is no scriptural basis for this discrimination.
- Whether or not a baby is Jewish is determined by the mother in a mixed parentage situation.
- Baby boys get circumsized at 8 days old in a ceremony, not in the hospital (unless an ill baby)
- Boys are recognized as spiritual men at 13 after they have their Bar Mitzvah. The Conservative and Reform movements allow girls the same ceremony but call it a Bat Mitzvah. Those who don't do it at 13 can do it at any point in their life. It allows the participant the right to read from the Torah scrolls on the Sabbath and holidays.
I've never heard the term "paradise earth" used prior to exposure to the Witnesses and I have a pretty extensive Jewish education and was raised in a combination of Conservative and Orthodox traditions.
One of the major differences between Christianity and Judaism (besides the obvious) is that we are taught love and respect for the Lord, not fear. We are encouraged to study, seek out multiple views and DISAGREE if we choose. The culture encourages its members to be well educated and always has. The reason men used to strive to be wealthy was not for the accumulation of things so much as to be able to have more leisure time to study the Torah (first five books of the old testament), the Haftorah, and other scriptual and related texts. The Haftorah, interestingly enough, was created during the Dark Ages and Inquistions when Jews couldn't openly study the Torah. Instead the studied the teaching of the great prophets who relayed the moral teaching via stories. In modern times, a passage from each, the old testament and the haftorah are read each Saturday am, and at the Bar or Bat Mitzvah of a young person.
Hope that helps.