art in an unlikely place

This graffiti is done by British artist Banksy on the Israeli Wall imprisoning the Palestinians in their own land. What do you think of the idea? Personally, I believe that nothing expresses unjustness (or justness), pain (or joy) , resentment (or excitement) like art. On the other hand, there is this point of view:

Old Palestinian man: You paint the wall, you make it look beautiful.
Banksy: Thanks
Old Palestinian man: We don't want it to be beautiful, we hate this wall, go home.

You can find more pictures on Banksy's website and you can read more about this here.

Mai