He was also an unapologetic Nazi.
Our Nazis beat Russia’s Nazis.
We knew that we had created a new means of warfare, and the question as to what nation, to what victorious nation we were willing to entrust this brainchild of ours was a moral decision more than anything else. We wanted to see the world spared another conflict such as Germany had just been through, and we felt that only by surrendering such a weapon to people who are guided by the Bible could such an assurance to the world be best secured.
This is why he and several others from his team sought out and surrendered to the US. This doesn't sound like an unapologetic Nazi to me.