...doing rocket science for the nazis.

He wrote of Hitler:

Yet, he also wrote that "to us, Hitler was still only a pompous fool with a Charlie Chaplin moustache"[31] and that he perceived him as "another Napoleon" who was "wholly without scruples, a godless man who thought himself the only god".[32]

And

Later, von Braun said: "I have very deep and sincere regret for the victims of the V-2 rockets, but there were victims on both sides...A war is a war, and when my country is at war, my duty is to help win that war."[1]: 351

Further, he knew how to flee when his life was under threat:

Nearing the end of the war, Hitler instructed SS troops to gas all technical men concerned with rocket development.[70] Upon hearing this, von Braun commandeered a train and fled with other "technical men" to a location in the mountains of South Germany. After some time, von Braun and many of the others who made it to the mountains left their location to flee to advancing American lines in Austria.[33]

Von Braun and several members of the engineering team, including Dornberger, made it to Austria.[74] On 2 May 1945, upon finding an American private from the U.S. 44th Infantry Division, von Braun's brother and fellow rocket engineer, Magnus, approached the soldier on a bicycle, calling out in broken English: "My name is Magnus von Braun. My brother invented the V-2. We want to surrender."[17][75]

Yeah fuck this guy and fuck everyone working on weapons to this day.

I'm an engineer. I solve problems. But I don't solve problems that involve killing people and ignoring my fucked up government.