I agree with this, I think. There's a difference between ignorance and stupidity*. One's personal values are going to contribute towards ignorance levels (some people are more naturally curious than others) as are one's circumstances (internet access, access to travel, education etc.). Ignorance doesn't, on it's own, bother me. We're all ignorant to some degree or another. Of many things.This basically means if you're not exposed to something to know it exists, it essentially doesn't exist to you. I don't think you can necessarily fault a person because of their lack of exposure to things.
Kind of related to what CzeCze was saying - there is a definite tendency to immediately label the opinions and beliefs of others as stupidity, if they don't agree with your own opinions and beliefs. One of the most obvious examples of this is US politics. Both sides have large factions that are completely convinced that those on the other side believe what they believe because they're *stupid*. This is, imo, a harmful thing. It cancels out meaningful discussion. But this is probably slightly O/T.
Btw, CzeCze, I love your quote.
*I have examples! From my real life!
Ignorance = "I have never been to Japan, know nothing about Japanese cuisine and have never tried sushi"
Stupidity = "Sushi is wrapped in grape leaves" (this coming from a 45 yr. old world traveling PhD who has been to Japan 3 times, loves sushi, and lives in an international-calibre city). HOW CAN YOU THINK SUSHI IS WRAPPED IN GRAPE LEAVES YOU TOTAL IDIOT?!! OK, maybe this is just me being a worked-up, spazzy ENTJ but oh boy I wanted to slap him.