As for many of the historical accounts that have been quoted throughout this thread thus far - I would say that none of them have been of the will of God. The crusades? That was something that the Pope, a man made position in a denomination steeped in man made traditions, said would be a good idea. That was not God's will. The holocost? The writings of Martin Luther? Neither of those expressed the will of God either. Just because someone can rip a quote out of context from the Bible, or through some flawed logic arrive at some conclusion that seems to be based on Scripture, that does not make it the will of God.
I truly believe that if all were to come together and follow the Scriptures in context, without denominational teaching, then we would be living and worshipping as God would have us to do.
An a final quick note (I've got to finish reading through this thread) I don't think that anyone who has ever taken action against Jews to be fulfilling the will of God. Granted I do not know every single account of history or is context, but as far as I know the justification of using Scripture to persecute any people has never been according to the will of God, but rather to some man who was trying to persuade the masses to complete some objective of his own.