Fallacy of Judeo-Christianity Freewill

I am thinking about freewill. I have been listening again to an audio book by Dr. Bart D. Ehrman a professor who teaches at UNC-Chapel Hill, he has written several books about the New Testament, but he wrote a book called God’s Problem: How the bible fails to answer our most important question Why we suffer. He wrote something I never considered before, and it was about freewill. Often theist use the argument that we suffer because we have freewill. He mentioned that this argument fails because if heaven exist, and if a being have freewill in heaven, there exist a place where a person can have freewill and there is no suffering. I thought about this deeper, for example, if Satan rebelled against God and took a third of heaven with him (see Revelations 12:6-9), then he and the angels he convinced to join him, had freewill, if not then they could not have rebelled. Furthermore, when mankind supposedly ate the forbidden fruit, The Lord God said, “Mankind has become like one of us, knowing good and evil, we must remove him from the garden, less he should eat from the tree of life, and live forever" (see Genesis 3:22), therefore the Lord God must have knowledge of suffering and yet the Lord God lives in a realm where suffering does not exist i.e. heaven, and if the Lord God could create a place where suffering does not exist and where beings exist with freewill, then he could have created us with freewill without suffering and therefore the whole garden incident was totally unnecessary. On a philosophical idea of freewill, does it exist or are things causally determined or is it both? I am a soft-determinist, I think our nature (environment) and nurture (social training) seems to be causal but our behavior or how we react is up to us. If we are not free to a certain degree then how do we learn new reactions or learn something new? Think about it...