Well, I would lose your attention (or that of the reader in this thread) if I were to lay out the whole book Isaiah, or this whole circumstance in a single post. I personally find lengthy posts discouraging for retaining people's attention. If you can make your point short and clear you will likely have my response.
Now, your answer is confusing. God decided what he would do based on something he already knew? Why would he do that? The quote doesn't say that I knew what you would do, so I determined how I would act. Rather, he says that he already determined and planned ahead what he is bringing to pass, (and specifically) using Sennacherib as an instrument of destruction. What here, say you, did he see for him to do this? It is circular thinking.
I know the accusation that if God ordained all things, directing them to occur at their proper time, that he would be responsible. However, I just showed you a verse where he clearly says that he ordained and carried out this destructive work in the king of Assyria. He directed in some sovereign way, read the verse again! However, there is no evil with God.
God may use second causes and other variables to direct free-working agents (humans) to act, freely of their own accord, freely from their own desires, that which he wants to occur without having a hand in the act itself. He didn't need to do anything to Job, Satan was already part of the plan. He didn't need to force Joseph to be a slave in Egypt, his brothers played the roles in their perfectly ordained circumstances to commit this wicked act. He had no fellowship with any in their sinning, but he directed them in the things around them that had an influence on what they would do themselves. His brothers willfully, freely and independently sold him from their own wickedness, but God ordained the means for all this to happen for a greater purpose in mind.