I've heard Rabbi Kahane and Chaim speak of this many times. The lesson of the holocaust is not that the gentile nations did not help the Jews; The real lesson of the holocaust is that Jews did not help Jews. This audio clip is very short but it is worth listening to. For a greater elaboration on this, listen to Rabbi Kahane's speech at the holiday inn in Brookline (available on youtube or google video).
http://jewishworldreview.com/jwisdom/scherman_holocaust.php3