Exactly. It is in fact fairly easy to argue that the actions of the Holocaust hurt us rather than gave us any benefit -- We lost a LOT of very productive members of society, especially those that fled to the US and then worked against us. There really wasn't anything that made a positive impact from it, so today we have no benefits that could have possibly been reaped.

However, argue this with one of the groups that lost so many people in the Holocaust and they jump up to remind you about how many terrible things were done to the people who died. Which is frustrating to me.