I always watch my words in intellectual discussions, fair Meriweather. It's respectful and wastes less of the other person's time. When I engaged the word "proper," what I meant was to doubt in the absence of empirical evidence,
BUT with an open mind. A person unwilling to absorb knowledge which may contradict his or her own is not engaging in proper skepticism, they're just a douchebag
Here is the situation: We cannot present physical evidence that Abraham ever lived, that he had a son, that he had an experience with God that revealed God did not want child sacrifice, God desires life, not death. Here is where Jews stand out in ancient times, a tradition that is still documented during Roman times, but not followed by Jews. Non-Jews were of the mind that the father held ownership of his wife, children, and property until he passed on. That means adult children were still under his ownership. The father could put children to death (offer them as sacrifice).
With Abraham, Jews learned not only did God desire life, not death, no child belongs to anyone but God. No child is the property of his/her father. Therefore, Jewish children were not sacrificed by a parent in honor of an ancestor. That child did not belong to any ancestor, only to God.
We see the difference in cultures here, cultures that spanned thousands of years. The Jews trace their deviation from the original culture of patriarchal ownership and child sacrifice back to Abraham and his experience of God.
Jewish belief in God resulted in more experiences of God being recorded, the belief that God is with us. Since God is with us, in our midst, then we who live today, are able to encounter him. Have you searched for modern day encounters with God? More importantly, have you sought God for yourself? How much does the skeptic throw himself into seeking God?