How can you blame the Germans?

It seems that 55% of Americans don't know that Planned Parenthood does abortions.

http://www.lifenews.com/2013/04/29/poll-55-of-americans-dont-know-planned-parenthood-does-abortions/

Millions of dead babies and the average American has no clue...  How many of those 55% could blame the citizenry of Germany during World War II for not knowing about the concentration camps?

In other news, 55% of football fans don't know that the NFL is a football league.