Can you simply state the OVT theological premise for their views?
God is righteous. God is just. God is love. God is sovereign. I think we all agree on these things.
When God created, all that He created was "very good." (Gen 1)
The only logical way for a righteous God who created a very good world to see His creation marred by evil is for one of His creations to have sufficient freedom to choose to commit evil, in spite of being instructed to do good, with God's sovereignty, His just nature, His rule over creation made clear in the consequences for doing evil. (See Genesis 2, where God commands Adam and Eve. See Romans 5, et al. for the necessity of justification before God to receive eternal life.)
Inexplicably, Adam sins. God's just nature is satisfied for the moment in cursing Adam and Eve (and the serpent), and God's loving nature extends to His creation in promising redemption.
The knowledge of good and evil arouses our passions, and sin begets more sin (Rom 7:5). As mankind reproduces, evil grows and pervades the earth, in spite of God's attempts to reach man (See Cain, Enoch, et al.)
In the time of Noah, the creation which God declared "very good" has descended to where God regrets creating
as a result of man's sinful works. (Gen 6)
God's just nature is about to be shown through His sovereignty over the earth, and He is about to wipe it out.
Thus, the premise is that God does not have anything to do with the existence of sin, and man's free choice to sin created a circumstance where God wishes He had not created Him.
Muz