Much like many Christians and Catholics, there are a lot of Jews that claim to be Jews yet have no clue what they are talking about. The Ten Commandments are as important to them as they are to Christians and everyone else. The Ten Commandments are given to Moses in the Bible in Exodus 20:3-17. Exodus is the second book of the five in the Torah and is a very important book to the Jews. Between the Ten Commandments and their conscience, you can show Jews that they are guilty and deserve to be punished by God. If they are convicted, they will realize their need for forgiveness and at this point you can explain what Jesus Christ did for them.