From what do you draw that conclusion? For a short period of time, the Allies would say a few words about that, followed by nothing. The Americans had captured a Mach 10 wind tunnel which they claimed was 'under construction.' In the July 1946 issue of Army Air Force Review, writer Charlotte Knight wrote an article titled "German Rocketeers. German rockets and guided missiles almost won the war for the Nazis." The article quotes Donald L. Putt, Commanding General at T-2 (Intelligence) at Wright Field. Here is the first sentence:
From comparison of Allied tech development during the war, with Nazi's. Also, from learning how much Nazi actually just blatantly stole from others (mostly from French and Italians), and declared "their own designs". At least, from simple logic: Nazi regime was dysfunctional, chaotic, plagued with constant internal rivalry and in-fighting, utter lack of cooperation and general anti-intellectual politics. What reasons are to assume that in engineering they
magically were able to do anything right (especially considering the well-known fact of dismal failure of their atomic project, for example)?
Seriously, it's time to stop believe in fairy tales, and start to look at facts. Germans never ever have anything comparable with American guided missiles - like "Bat", "Felix", GB-4, TDR-1 assault drone, and many, many others. Their guided bombs were primitive and crude, far below American level of engineering. And this is simple facts; when the best Nazi could suggest was
"der operator watch der missile and push-push wunderknuppel", Americans already tested semi-active radar homing guided bomb, and decided that they wanted fully autonomous radar homer.