It's not just about poverty or lack of education, though. That's too simplistic. Not every impoverished and uneducated place in the world stones women. And the government officials of Iran, Saudi Arabia, and other countries, who implement stoning as part of the legal system in these countries, are not impoverished or uneducated people. They simply believe in a view of women, and an "honor" system, in which it is sometimes okay to stone a person to death for certain crimes.
Now, is this the Islamic view? No. I'm not saying that. But there is a belief, and an ideology, about women, and about crime and punishment, that needs to be changed in many parts of the world. What is needed is not just education but also persuasion to a different point of view. I do not mean to equate Nazi Germany to any modern country, but consider Nazi Germany for a moment: we would never say that the Nazis were uneducated, or illiterate. Fighting Nazism was a matter of persuasion as much as education, and the same is true in the case of ideologies today which deny women's rights.