Was God different in Old Testament times compared to New Testament times? Origen, one of the Church fathers, lived 185-253. He addressed this question, which was being asked in his day: Why was God so harsh on the Amalekites?
Origen thought about this, deciding the Bible had to be read as a whole, particularly considering the last book, Revelation, where the Lamb (Jesus) opened the scroll (the Bible). This will show how early on the Catholic Church did not take every Biblical story literally, how allegory was often used.
What is your take: Did God literally command the deaths of all the Amalekites, their crops and animals destroyed? If so, why that command?