"God promised to Abraham to give this country to you and to your children"
... David Ben-Gurion (Former Prime Minister of Israel)
However, If God is your authority, you have no authority. There is no evidence of God and your belief is not evidence. When you claim God is your authority, you are in reality saying your authority is you and your religious belief.
In this age in which few are willing to accept personal responsibility your sophistry is enduringly popular. However, the response to, "Do this because God has told me that you should", should always be, "Give us evidence of the existence of God. Your belief is not evidence and your Holy Books are evidence only that Men wrote them. They are not evidence of God, the most successful political weapon yet devised by man".