What year did Abraham found Judaism?
Abraham did not found Judaism. Abraham had a son, Issac, who had a son,Jacob, who had twelve sons. One of these twelve was named Judah. Those who are of the linage of Judah, his offspring are known as the Jews. Judaism as it is called today is actually what the whole of Israel practiced(with certain changes down through the ages) as called being under the law. Judah was only one of twelve tribes but it was the one Our Lord was born into.
