This bumper sticker is equal in absurdity to the following:
"Remember the redcoats, boycott black tea!"
"Remember slavery, buy hemp!"
"Remember Hilter, don't buy Volkswagen!."
"Remember the Gulf War, don't eat hummus!"
If you put this on your car you are broadcasting a racist anti-Japanese sentiment. How is that okay, as long as it's against Japanese?
Anyone who is Japanese should be offended by this. I can understand the "buy american" message to some extent, but this is extreme. Besides, most foreign car companies have factories in america, where they employ americans.