Is God Altruistic? Is God Happy?

[Belacqua]

Secondly immutability not only stems from
scripture, but also by gods other attributes as well, such as by being eternal and omniscient

I think this is why we can address immutability somewhat separate from Bible verses. There is a lot of thinking about God that isn't specifically in the Bible.

In this I think that tackattack was on the right track. "Perfection" in the case of God means, also, immutability. In some cases perfection would be different, as if we were talking about a perfect steak dinner. That would demand change, because it wouldn't be perfect if you couldn't digest it. When people talk about God, though, perfection includes immutability because any change from perfection would mean a change away from perfection. 

the verse if read literally implies gods is effected or changed by the actions of humans

Maybe I'm reading you wrong, but doesn't the verse imply that God ISN'T affected or changed in this way? It says “For I the Lord do not change."

So when did god feel hatred after the actions were performed, or when he knew the actions were going to take place?

This, as usual, is a problem for people who read every verse in its most literal and simplest sense. Sola scriptura fundies and New Atheists. 

For a very long time people have discussed uni-vocal language, equi-vocal language, analogous language, etc. One of the whole reasons for talking about God is as a concept or place-holder for something that is beyond human description and can't easily be talked about in normal language. 

It's common for careless people to call all of this "metaphor," though metaphor is strictly speaking a specific type of trope. A is B, as when Baudelaire says that nature is a temple. That trope isn't relevant for Malachi's verse.