When you read through the bible, you tend to get the impression that the God of the Old Testament and the God of the New Testament are two totally different gods. This impression comes, I think, from the cultural attitudes of the writers of the particular books. The point is this smiting mentality is what leads to the misinterpretation of who God is. Jesus spent most of His time trying to clear that all up. Many times He said that it is written… but I say unto you. So even He was saying it was misinterpreted.
So how do we determine that God, whom we know is changeless – perfection needs no change, is the same God in both Testaments? We read, very, very carefully and prayerfully. For example, doesn’t Jesus say that He is the I AM, from when God spoke to Moses through the burning bush in John 8:58?
Jesus said to them, “Amen, amen, I say to you, before Abraham was made, I am.” – John 8:58
And also, in the Old Testament. God say the He wants to dwell with mankind before Jesus in Exodus 29:45 – 46?
“And I will live in the midst of the sons of Israel, and I will be their God. And they shall know that I am the Lord their God, who led them away from the land of Egypt, so that I might dwell among them. I am the Lord their God.” – Exodus 29:45 – 46
So, since we know that they are the same God. And we know that God does not change. Therefore, the only reason that we think that the two are completely different is that we are reading the Bible wrong.
So as you read the Bible ask yourself, “Since God is Love, what does this mean?” Then prayerfully read it.
Peace be with you.