a Calvinist does not believe God is stone idol but that is what open theist say Calvinist believe every time
do open theist say God is guessing, of course not , but it is the natural conclusion of what open theist teach
not mischaracterization but natural conclusion
sooo not guessing but then you say could be guessing .
no lies to repent of .
God is prophesying the punishment and the unrepentance
and you an open theist say God is guessing that he may or may not punish & they may or may not repent.
Rev 16:8 And the fourth angel poured out his vial onto the sun. And it was given to him to burn men with fire.
Rev 16:9 And men were burned with great heat. And they blasphemed the name of God, He having authority over these plagues. And they did not repent in order to give Him glory.
I agree with Clete that open theists, for the most part, don't think God is guessing. In the case of prophecying unrepentance, which is a valid argument, I think I could almost do as well, as I watch the United States devolve into not just a non-Christian nation, but an anti-Christian nation. And God would have much, much, MUCH more knowledge and foresight into what men will do under the circumstances He is preparing than I ever could.
Rev 16:9 doesn't say "everybody" blasphemed God. Some might actually repent, but it is very likely many will not. In fact, I can imagine firefighters, for instance, trying to fight out-of-control fires in California recently, blaspheming often, specifically using the name of Jesus Christ, but specifically NOT calling on Him to help. My daughter volunteers as a firefighter, and she can attest that firefighters don't have the cleanest language.