While I have no idea regarding the number of Nazi Jews, I have actually read about Jews being prominent figures during that time. Could it have been so that they would be seen as being compliant and not killed? Possibly. But I have a Jewish friend who even today, for some reason, tells me during WW2 he would have helped Hitler. I think the self-hating issue is the bigger concern that needs to be looked at as I find it to be quite serious.
Roadside bomb kills five border officers in western Iraq (AP)
from the article: DNA tests reveal Hitler's Jewish and African roots