There is a new, about 200 years old, idea brought about by the enlightenment. This new idea wants to separate the Jew belief system from it national make-up. Fabricating the concept of German of the Mosaic religion etc.. If you want to know what Judaism is ask the Jews. We say we are a remanent of a classical ancient people. Like all peoples of that time, a nation had a god that was associated with that nation. Your lack of knowledge is what allowed you to come to the conclusion you came too. But now you know. Our culture is pre-catholic (Universal), and therefore married to religion.
Israeli ambassador to U.K.: Elements of left 'in denial' about 'disease' of anti-Semitism (Haaretz)
from the article: You can't be a Jewish Muslim