In a non-believers eyes, they would say our teachings are lies. How can your God give the 10 Commandments to Moses and turn around and do thee the exact same thing, that He just Commanded not to do, in Canaan. This is a subject, that confused me for a little while. As I prayed, to better understand His ways, He revealed to me that His Will, must be done on Earth, as it is in Heaven. Most people don't understand the WiLL of God, that nothing can stop you from the mission that has be given to you from The ALmighty Himself. I learned this from another Commandment that He gave us.
(Exodus 20:12) "Honor thy Father and thy Mother, that thy days may be long upon the land which the Lord thy God giveth thee "
Now just an FYI, I love my parents, they have taught me many things, and brought me up to be a respectful, caring, and loving person. So, a little story: if Dad and Mom, told me to do something, and God is telling me to do something else, who would you listen too? The Commandments clearly states one to "Honor thy Father and thy Mother", to me this is what He revealed to me. By honoring Thy Dad and Mom, you would have to listen to God, to bring more blessings to the family, a sort of victory, because, it's God's plan always in the End. Your story, isn't told by your parents, it's made and told by God. So there, that is my answer. We may have a tough battle ahead when this subject comes tangled with us in the near future, so be ready brothers and sisters, with your answers. Let God lead the charge, and we shall find victory, in every battle.