Probably reasonable people would differ on whether unfavourably viewed (by the West) countries, such as Iran, Cuba, Palestine, or Saudi Arabia are disliked for good reason or not.

I agree with other comments that “China” in this context is intended to refer to porcelain. However including “Persian” (rugs?), “Cubano” (cigars?), “Afghan” (dogs?), or Arab (numerals?) as nouns in your cute online insult generator is probably a bad idea.

Edit: I see that “Boston” and “English” are also included as insults. At least with those there can be no doubt.