Nuclear power was "Jewish physics"- the Nazis had been opposed to relativity from the beginning, as evidenced by the 1932 tract "One Hundred Authors Against Einstein". (Einstein's response was "Why 100? If I'm wrong, one is enough!")

Without the physics, they would have been unlikely to develop nuclear weapons. The rocketry would have delivered fairly devastating conventional payloads though, as in fact they did, but again that assumes that they would have not been more preoccupied with the Russians.