A Chinese man and his Jewish friend were walking along one day when the Jewish man whirled and slugged the Chinese man and knocked him down. 

"What was that for?" the Chinese man asked. 

"That was for Pearl Harbor!" the Jewish man said. 

"Pearl Harbor? That was the Japanese. I'm Chinese." 

"Chinese, Japanese, you are all the same!" 

"Oh!" 

They continued walking and after a while the Chinese man whirled and knocked the Jewish man to the ground. 

"What was that for?" the Jewish man asked. 

"That was for the Titanic!" 

"The Titanic? That was an iceberg." 

"Iceberg, Goldberg, you are all the same."