Huh. Wikipedia says that "racially pure" people were encouraged to breed, but it wasn't really a forced program. Well, that's one for the Nazis, that it wasn't a rape thing. And, like, 50 million against, so they've still got a ways to go.
See, the thing is, though, that the Nazi ideal didn't really exist. They were going for genetically pure Germans, but that's a flawed assumption from the very beginning. People are horny little buggers, and the idea of a "pure" something or other is pretty dumb, particularly in Europe. Europeans got around, plus they were in a good spot to be invaded a lot. Australian Aboriginals might make a case for being "pure" Australian, but Europeans are mutts. I mean, there was mixing all around the Mediterranean, and, as someone descended from eastern Europeans, I would not at all be surprised to find I have Mongolian blood, with all the raping and the pillaging. Even without the other continents, Europe was screwing around with each other, anyway. Polish people are pretty much the same as Germans, and they've certainly interbred, but the Nazis thought they were inferior.
So, clearly, Germans aren't likely pure anything. Then there's the fact that they really aren't any better than anyone else, anyway. And I say this as a part-German. Even if you screen Germans for every genetic disease you can think of and only let the completely undiseased ones breed, their children still aren't going to be "perfect". They're not likely to be smarter, stronger, faster, wittier, or better at making cookies than anyone else. The Nazis disagree, but then they are mass-murdering f#ckheads, so their opinion doesn't count.
