They do know that the wall has not been built just for security, but as an excuse for yet another land grab of Palestinian land. If it was constructed on the Israeli side and followed a straight route, the Palestinians would have no problem with it at all. In fact it could be an acceptable border for the Palestinian state.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: Occupation tourism: A new trend at West Bank fence protest