While I will agree that I will never know all things about God, I do not like to take the attitude that whatever happens is because God wanted it to happen and he had some grand purpose in it that I just can't understand.

I do know God's will in many areas simply because he has told me in his word. Some things happen because we live in a fallen world and men have free will and make bad choices.

I do believe that God will try to bring about good from any bad situation but that doesn't mean that he orchestrated things so that the bad situation would happen.