German Scientist didn't believe that a nuclear bomb could be completed in time to make a difference in the war. They estimated that America would complete their

German Scientist didn't believe that a nuclear bomb could be completed in time to make a difference in the war. They estimated that America would complete their bomb first, only after 1944 and that if Germany hadn't won the war by 1944, victory would be impossible. And they were right, America didn't complete their bomb until 1945, and by that point it was too late to make any impact in the outcome of the war (other than forcing Japan to surrender). So they decided to focus resources elsewhere. The amount of resources spent on the German Nuclear reactor program was actually quite small.