True Jews abide by the Torah (Old Testament).
They do not abide by the teachings in the New Testament.
90% of American Jews are atheist and communist.
The Torah and the Talmud.
Dennis Prager has said that the Talmud is equal to the Torah.
Although I've heard other Jews say that the Talmud is less important, and others say that it's more important.
Then there are the Karaite Jews (a small minority) who entirely disregard the Talmud.