It complicates things if God is all good, because that would make us all good too...... What if we are fragments of God? Does that change what is "good" or "evil"?
However, if we assume that what God commands or does is good simply because God commands or does it (i.e. God's word or action is good by definition - perhaps because they are consistent with His eternal, unchanging nature) then this makes good and evil seems somewhat arbitrary - if God does or commands something that causes harm or suffering to people, that is - by definition - good. There are many instances in the bible where this can be seen. However, God also forbids man from doing some things that cause harm or suffering to other people - things that God has done, but man may not. So there seems to be two forms of good - one for God and one for man; and some of the good things God does are evil if done by man... it could get very confusing

Syllogistically:
P1: actions consistent with God's nature are good (morally right) and actions inconsistent with God's nature are evil (morally wrong).
P2: God's actions are always consistent with God's nature.
P3: therefore (p1, p2) God's actions are always good.
P4: God has caused harm and suffering (e.g., killing people) according to the Bible.
C: therefore (P3, P4) if the Bible is valid, causing harm and suffering (e.g., killing people) is good.
If C is not valid for mankind, then we must logically reject the idea that God's nature and actions provide a moral standard for mankind...
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