As I said, the OT was the promise (salvation) and the NT the fulfillment.

And God as King would have been portrayed as an earthly king only more powerful and terrible. Offend an earthly king at the time even the slightest and if you're lucky your death wouldn't be too horrible. That's what the people understood, that's what they wrote. Terrible but just.

Keep in mind the OT was written to teach moral values, like follow God's commands, which is true in the NT too. Not to precisely describe the nature of God. That came later. (my opinion)

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.