I held a door for an elderly Japanese man. He said ""Sank you."" Why did he have to bring up Pearl Harbor like that?

Man, Asians drive so bad . . . I'm starting to think Pearl Harbor was an accident.

Asian drivers are so bad that some speculate that Pearl Harbor might have been an accident

Not realizing today's date, I just made a Pearl Harbor joke to someone... Needless to say, it bombed.