JHE
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Below is a link to an interesting compilation of "golden dawn"' Nazi propaganda from their publications. Unfortunately it is in Greek, but from the plentiful pictures you can get an idea of their glorification of the Nazis and their "Greek" collaborators during the WWII occupation.
http://jungle-report.blogspot.com/2012/03/blog-post.html
If it is really true that New Dawn are enthusiastic about the WW2 German occupation of Greece, that will surely put a cap (and a low cap) on their potential support. Obviously, to grow they have to attract support from patriotic Greeks, who in general will be repulsed by support for the murderous Nazi occupation of their country.