God permitted the Holocaust because He has given man free will. He did not positively will it so that He could use the deaths of six million Jews to create the state of Israel.
You seem to be saying that everything that happens is God's will. That is simply not true.
When a natural disaster strikes and thousand are killed or displaced as homeless, the first words always expressed by people of faith are....
"IT'S GOD'S WILL!"
Isn't that true?
Ultimately, yes everything that happens is God's will. If he didn't want it to happen, he certainly has the power to stop it. And he is free to violate our free will at his leisure. Indeed, our ultimate deaths are entirely in the hands of God. We may will ourselves to live forever, but the time that we die has been appointed. Everyone who died in WWII died exactly at the time they were appointed to die. God was in control then and he is in control now. You will die on the date that God has appointed you to die. And so will I. Even if we commit suicide, we are not surprising God. If we succeed then that was our appointed day and hour.