Divine Command Theory and the Incarnation It's easy to find faults in the bible depending on the interpretation given. In the old testament, much of what is said about God contradicts with what is given in the new testament. This is because, in the old testament God is also tempestuous, impulsive, impassioned, basically everything you would say of someone with little self-discipline. Then again, they're all hearsay statements since only the prophets dealt with God directly and none of them were the actual writers. It is possible that some of those human-like actions were actually perpetrated by the prophets and were attributed to God because of their relation. The point of view of the writers seems to have coloured much of the information in the Bible.
However, from the time of prophet Samuel onwards, God's representation gets better the further on towards the new testament. From the early old testament books, even I questioned whether morality was solely dependent on God's commands, but as you read on especially in the new testament, we realise that God's nature is absolute and that the laws He gives are to govern human conduct which is why they may change in interpretation. This is largely expressed when Jesus says, "the sabbath was made for man, and not man for the sabbath." The laws are like tools which humans use to govern their relations but are not supposed to override their free-will which allows them to determine whatever course of action they choose.
The only hint to reincarnation I know of in the Bible is when Jesus says that John the baptist is the former prophet Elias (Elijah). Certain other interpretations use the teaching about being born again as implying reincarnation but for me it's not definite. So far, reincarnation is not a christian teaching.