The Jewish Law or Halacha is derived from the Scripture (Torah), based on long and exhaustive rabbinical interpretations of God's laws. Mom already explained why it is impossible to make oneself righteous by the law -- for to do so one has to obey it perfectly and no one, given our nature, can do it. I have no idea what you're talking about or why you've gone into a whole explanation about what some Jews believe. I've been trying to tell you that some Jews, and especially the Jews of Christ's time DID NOT interpret scripture correctly. They added their own laws and regulations. You're answer seems to be that they "based" them on scripture so scripture must be wrong. Well Christianity is also based on the same scripture so must it also be wrong?
Of course, according to you, the rabbis who spent their entire lives studying the Scriputres just didn't get it right -- until you came along with your gnostic knowledge. You keep saying they added, and they say what was added is already there and in agreement with the Torah. Somehow, I am willing to bet that they know what they are talking about.
You are the one who defines your church by the law and not by Grace. From a Christian perspective, that is not so.