That's what my post was getting at, over-generalising about an entire continent...

It was a snippy comment. If you don't specify "South" Africa (which itself is a generalization), people can get jimmies rustled. It is like saying I live in America. People know exactly what you mean from context, but some will be pedantic about "America" including many countries in North and South America.

If there were no context (not the situation with this post), then it could lead to confusion.