We do not choose the family in which we are born. We are raised in the family of our birth and are given the belief that the religion of our family is the best. We believe it, follow it and die with it, not knowing much about other beliefs. God has perfect knowledge.
His guidance can only be perfect. So "read in the name of thy Lord who created you". Knowledge is power and helps us to make rational decisions. Choose wisely and do not fail. For, at the end, only the truth will prevail.