Blaming the bombing of Pearl Harbor on the Germans is a long running and hopefully obvious Boneyard joke. The satirical nature of the post is evidenced by the fact that was made in response to BigErnMcCracken's quip about this board's level of censorship being similar to Germany under Stalin. Speaking of Germany under Stalin, if you didn't think BigErn was joking or referring to East Germany, you should probably have ridden to the rescue on your fact-checking steed after that comment as well.
I understand that the Boneyard is populated by a bunch of degenerates, but do give us a little credit.